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                           <rdf:li><rdf:Description xmpDM:name="Application Layer Raj Jain Washington University in Saint Louis Saint Louis, MO 63130 Jain@wustl.edu" xmpDM:startTime="0" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Audio/Video recordings of this lecture are available on-line at: http://www.cse.wustl.edu/~jain/cse473-20/" xmpDM:startTime="0" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="" xmpDM:startTime="0" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Overview Network Application Architecture HyperText Transfer Protocol (HTTP) File Transfer and Email protocols Domain Name Service Peer-to-Peer Applications Note: This" xmpDM:startTime="5400" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="class lecture is based on Chapter 2 of the textbook (Kurose and Ross) and the figures provided by the authors." xmpDM:startTime="5400" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description 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HTTP/1.1" xmpDM:startTime="2920467" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Header Fields = Host, Connection, User-agent, …" xmpDM:startTime="2920467" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="HTTP Request Message Format HTTPrequest" xmpDM:startTime="2932600" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Sample HTTP Response Message HTTP/1.1" xmpDM:startTime="2932967" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="200 OK Connection: close Date: Tue, 09 Sept 2009 13:00:15 GMT Server: Apache/1.3.0" xmpDM:startTime="2932967" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="(Unix) Last-Modified: Sun, 6 May 2009 09:23:24 GMT Content-Length: 6500 Content-Type: Text/html Data… Status Codes: 200 OK 301 Moved Permanently" xmpDM:startTime="2932967" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="400 Bad Request 404 Not Found 505 HTTP Version Not Supported" xmpDM:startTime="2932967" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="HTTP Response Message Format Version sp Status code sp Phrase cr lf Header field Name: sp value cr lf Header" xmpDM:startTime="2966600" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="field Name: sp value cr lf cr lf Status Line Header lines Blank line Entity body" xmpDM:startTime="2966600" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Hands-on HTTP telnet www1.cse.wustl.edu" xmpDM:startTime="2969300" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="80 GET /~jain/cse473-19/sample.htm" xmpDM:startTime="2969300" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="HTTP/1.1" xmpDM:startTime="2969300" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Host: www1.cse.wustl.edu" xmpDM:startTime="2969300" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="HTTP/1.1" xmpDM:startTime="2969300" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="200 OK Date: Tue, 13 Sep 2019 23:39:53 GMT Server: Apache/2.2.3" xmpDM:startTime="2969300" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="(CentOS) Accept-Ranges: bytes Content-Length: 233 Connection: close Content-Type: text/html; charset=ISO-8859-1 &lt;HTML&gt; &lt;head&gt; &lt;/head&gt; &lt;body&gt; This is a sample text." xmpDM:startTime="2969300" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="&lt;/body&gt; &lt;/html&gt; This is a sample text." xmpDM:startTime="2969300" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="" xmpDM:startTime="2969300" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="HTTP Response Message Format Version sp Status code sp Phrase cr lf Header field Name: sp value cr lf Header" xmpDM:startTime="3108300" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="field Name: sp value cr lf cr lf Status Line Header lines Blank line Entity body" xmpDM:startTime="3108300" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Sample HTTP Response Message HTTP/1.1" xmpDM:startTime="3108767" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="200 OK Connection: close Date: Tue, 09 Sept 2009 13:00:15 GMT Server: Apache/1.3.0" xmpDM:startTime="3108767" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="(Unix) Last-Modified: Sun, 6 May 2009 09:23:24 GMT Content-Length: 6500 Content-Type: Text/html Data… Status Codes: 200 OK 301 Moved Permanently" xmpDM:startTime="3108767" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="400 Bad Request 404 Not Found 505 HTTP Version Not Supported" xmpDM:startTime="3108767" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="HTTP Response Message Format Version sp Status code sp Phrase cr lf Header field Name: sp value cr lf Header" xmpDM:startTime="3110000" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="field Name: sp value cr lf cr lf Status Line Header lines Blank line Entity body" xmpDM:startTime="3110000" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Sample HTTP Response Message HTTP/1.1" xmpDM:startTime="3111133" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="200 OK Connection: close Date: Tue, 09 Sept 2009 13:00:15 GMT Server: Apache/1.3.0" xmpDM:startTime="3111133" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="(Unix) Last-Modified: Sun, 6 May 2009 09:23:24 GMT Content-Length: 6500 Content-Type: Text/html Data… Status Codes: 200 OK 301 Moved Permanently" xmpDM:startTime="3111133" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="400 Bad Request 404 Not Found 505 HTTP Version Not Supported" xmpDM:startTime="3111133" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="HTTP Request Message Format HTTPrequest" xmpDM:startTime="3111533" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Sample HTTP Response Message HTTP/1.1" xmpDM:startTime="3114333" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="200 OK Connection: close Date: Tue, 09 Sept 2009 13:00:15 GMT Server: Apache/1.3.0" xmpDM:startTime="3114333" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="(Unix) Last-Modified: Sun, 6 May 2009 09:23:24 GMT Content-Length: 6500 Content-Type: Text/html Data… Status Codes: 200 OK 301 Moved Permanently" xmpDM:startTime="3114333" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="400 Bad Request 404 Not Found 505 HTTP Version Not Supported" xmpDM:startTime="3114333" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="HTTP Response Message Format Version sp Status code sp Phrase cr lf Header field Name: sp value cr lf Header" xmpDM:startTime="3115033" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="field Name: sp value cr lf cr lf Status Line Header lines Blank line Entity body" xmpDM:startTime="3115033" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Hands-on HTTP telnet www1.cse.wustl.edu" xmpDM:startTime="3120167" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="80 GET /~jain/cse473-19/sample.htm" xmpDM:startTime="3120167" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="HTTP/1.1" xmpDM:startTime="3120167" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Host: www1.cse.wustl.edu" xmpDM:startTime="3120167" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="HTTP/1.1" xmpDM:startTime="3120167" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="200 OK Date: Tue, 13 Sep 2019 23:39:53 GMT Server: Apache/2.2.3" xmpDM:startTime="3120167" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="(CentOS) Accept-Ranges: bytes Content-Length: 233 Connection: close Content-Type: text/html; charset=ISO-8859-1 &lt;HTML&gt; &lt;head&gt; &lt;/head&gt; &lt;body&gt; This is a sample text." xmpDM:startTime="3120167" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="&lt;/body&gt; &lt;/html&gt; This is a sample text." xmpDM:startTime="3120167" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="" xmpDM:startTime="3120167" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Hands-on HTTP (cont) telnet www1.cse.wustl.edu" xmpDM:startTime="3221267" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="80 GET /~jain/cse473-08/sample.htm" xmpDM:startTime="3221267" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="HTTP/1.1" xmpDM:startTime="3221267" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Host: www1.cse.wustl.edu" xmpDM:startTime="3221267" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="HTTP/1.1" xmpDM:startTime="3221267" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="404 Not Found Date: Tue, 13 Sep 2019 23:42:48 GMT Server: Apache/2.2.3" xmpDM:startTime="3221267" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="(CentOS) Content-Length: 307 Connection: close Content-Type: text/html; charset=iso-8859-1 &lt;!DOCTYPE HTML PUBLIC &quot;-//IETF//DTD HTML 2.0//EN&quot;&gt;" xmpDM:startTime="3221267" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="&lt;html&gt;&lt;head&gt; &lt;title&gt;404 Not Found&lt;/title&gt; &lt;/head&gt;&lt;body&gt; &lt;h1&gt;Not Found&lt;/h1&gt; &lt;p&gt;The requested URL /~jain/cse473-08/sample.htm" xmpDM:startTime="3221267" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="was not found on this server.&lt;/p&gt;" xmpDM:startTime="3221267" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="&lt;hr&gt; &lt;address&gt;Apache/2.2.3" xmpDM:startTime="3221267" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="(CentOS) Server at www1.cse.wustl.edu" xmpDM:startTime="3221267" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Port 80&lt;/address&gt; &lt;/body&gt;&lt;/html&gt; temp" xmpDM:startTime="3221267" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Cookies Allow servers to remember previous information C:\Documents and Settings\Raj Jain\Cookies\ client server usual http response msg usual http response" xmpDM:startTime="3379000" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="msg cookie file one week later: usual http request msg cookie: 1678 cookie- specific action access ebay 8734 usual http" xmpDM:startTime="3379000" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="request msg Amazon server creates ID 1678 for user create entry usual http response Set-cookie: 1678 ebay 8734 amazon 1678" xmpDM:startTime="3379000" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="usual http request msg cookie: 1678 cookie- spectific action access ebay 8734 amazon 1678 backend database Cookie from Amazon Cookie" xmpDM:startTime="3379000" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="from Ebay" xmpDM:startTime="3379000" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Proxy Server: Web Caching All requests are sent to proxy server Proxy server caches objects Only new objects are requested" xmpDM:startTime="3706800" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="from origin server Fast, Lower traffic on the link client Proxy server client HTTP request HTTP response HTTP request HTTP" xmpDM:startTime="3706800" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="request origin server HTTP response HTTP response" xmpDM:startTime="3706800" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Cookies Allow servers to remember previous information C:\Documents and Settings\Raj Jain\Cookies\ client server usual http response msg usual http response" xmpDM:startTime="3790333" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="msg cookie file one week later: usual http request msg cookie: 1678 cookie- specific action access ebay 8734 usual http" xmpDM:startTime="3790333" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="request msg Amazon server creates ID 1678 for user create entry usual http response Set-cookie: 1678 ebay 8734 amazon 1678" xmpDM:startTime="3790333" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="usual http request msg cookie: 1678 cookie- spectific action access ebay 8734 amazon 1678 backend database Cookie from Amazon Cookie" xmpDM:startTime="3790333" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="from Ebay" xmpDM:startTime="3790333" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Hands-on HTTP (cont) telnet www1.cse.wustl.edu" xmpDM:startTime="3790767" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="80 GET /~jain/cse473-08/sample.htm" xmpDM:startTime="3790767" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="HTTP/1.1" xmpDM:startTime="3790767" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Host: www1.cse.wustl.edu" xmpDM:startTime="3790767" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="HTTP/1.1" xmpDM:startTime="3790767" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="404 Not Found Date: Tue, 13 Sep 2019 23:42:48 GMT Server: Apache/2.2.3" xmpDM:startTime="3790767" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="(CentOS) Content-Length: 307 Connection: close Content-Type: text/html; charset=iso-8859-1 &lt;!DOCTYPE HTML PUBLIC &quot;-//IETF//DTD HTML 2.0//EN&quot;&gt;" xmpDM:startTime="3790767" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="&lt;html&gt;&lt;head&gt; &lt;title&gt;404 Not Found&lt;/title&gt; &lt;/head&gt;&lt;body&gt; &lt;h1&gt;Not Found&lt;/h1&gt; &lt;p&gt;The requested URL /~jain/cse473-08/sample.htm" xmpDM:startTime="3790767" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="was not found on this server.&lt;/p&gt;" xmpDM:startTime="3790767" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="&lt;hr&gt; &lt;address&gt;Apache/2.2.3" xmpDM:startTime="3790767" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="(CentOS) Server at www1.cse.wustl.edu" xmpDM:startTime="3790767" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Port 80&lt;/address&gt; &lt;/body&gt;&lt;/html&gt; temp" xmpDM:startTime="3790767" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Hands-on HTTP telnet www1.cse.wustl.edu" xmpDM:startTime="3796933" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="80 GET /~jain/cse473-19/sample.htm" xmpDM:startTime="3796933" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="HTTP/1.1" xmpDM:startTime="3796933" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Host: www1.cse.wustl.edu" xmpDM:startTime="3796933" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="HTTP/1.1" xmpDM:startTime="3796933" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="200 OK Date: Tue, 13 Sep 2019 23:39:53 GMT Server: Apache/2.2.3" xmpDM:startTime="3796933" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="(CentOS) Accept-Ranges: bytes Content-Length: 233 Connection: close Content-Type: text/html; charset=ISO-8859-1 &lt;HTML&gt; &lt;head&gt; &lt;/head&gt; &lt;body&gt; This is a sample text." xmpDM:startTime="3796933" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="&lt;/body&gt; &lt;/html&gt; This is a sample text." xmpDM:startTime="3796933" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="" xmpDM:startTime="3796933" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="HTTP Response Message Format Version sp Status code sp Phrase cr lf Header field Name: sp value cr lf Header" xmpDM:startTime="3799300" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="field Name: sp value cr lf cr lf Status Line Header lines Blank line Entity body" xmpDM:startTime="3799300" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Hands-on HTTP telnet www1.cse.wustl.edu" xmpDM:startTime="3846100" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="80 GET /~jain/cse473-19/sample.htm" xmpDM:startTime="3846100" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="HTTP/1.1" xmpDM:startTime="3846100" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Host: www1.cse.wustl.edu" xmpDM:startTime="3846100" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="HTTP/1.1" xmpDM:startTime="3846100" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="200 OK Date: Tue, 13 Sep 2019 23:39:53 GMT Server: Apache/2.2.3" xmpDM:startTime="3846100" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="(CentOS) Accept-Ranges: bytes Content-Length: 233 Connection: close Content-Type: text/html; charset=ISO-8859-1 &lt;HTML&gt; &lt;head&gt; &lt;/head&gt; &lt;body&gt; This is a sample text." xmpDM:startTime="3846100" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="&lt;/body&gt; &lt;/html&gt; This is a sample text." xmpDM:startTime="3846100" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="" xmpDM:startTime="3846100" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Hands-on HTTP (cont) telnet www1.cse.wustl.edu" xmpDM:startTime="3846700" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="80 GET /~jain/cse473-08/sample.htm" xmpDM:startTime="3846700" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="HTTP/1.1" xmpDM:startTime="3846700" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Host: www1.cse.wustl.edu" xmpDM:startTime="3846700" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="HTTP/1.1" xmpDM:startTime="3846700" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="404 Not Found Date: Tue, 13 Sep 2019 23:42:48 GMT Server: Apache/2.2.3" xmpDM:startTime="3846700" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="(CentOS) Content-Length: 307 Connection: close Content-Type: text/html; charset=iso-8859-1 &lt;!DOCTYPE HTML PUBLIC &quot;-//IETF//DTD HTML 2.0//EN&quot;&gt;" xmpDM:startTime="3846700" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="&lt;html&gt;&lt;head&gt; &lt;title&gt;404 Not Found&lt;/title&gt; &lt;/head&gt;&lt;body&gt; &lt;h1&gt;Not Found&lt;/h1&gt; &lt;p&gt;The requested URL /~jain/cse473-08/sample.htm" xmpDM:startTime="3846700" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="was not found on this server.&lt;/p&gt;" xmpDM:startTime="3846700" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="&lt;hr&gt; &lt;address&gt;Apache/2.2.3" xmpDM:startTime="3846700" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="(CentOS) Server at www1.cse.wustl.edu" xmpDM:startTime="3846700" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Port 80&lt;/address&gt; &lt;/body&gt;&lt;/html&gt; temp" xmpDM:startTime="3846700" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Cookies Allow servers to remember previous information C:\Documents and Settings\Raj Jain\Cookies\ client server usual http response msg usual http response" xmpDM:startTime="3847200" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="msg cookie file one week later: usual http request msg cookie: 1678 cookie- specific action access ebay 8734 usual http" xmpDM:startTime="3847200" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="request msg Amazon server creates ID 1678 for user create entry usual http response Set-cookie: 1678 ebay 8734 amazon 1678" xmpDM:startTime="3847200" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="usual http request msg cookie: 1678 cookie- spectific action access ebay 8734 amazon 1678 backend database Cookie from Amazon Cookie" xmpDM:startTime="3847200" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="from Ebay" xmpDM:startTime="3847200" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Proxy Server: Web Caching All requests are sent to proxy server Proxy server caches objects Only new objects are requested" xmpDM:startTime="3847933" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="from origin server Fast, Lower traffic on the link client Proxy server client HTTP request HTTP response HTTP request HTTP" xmpDM:startTime="3847933" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="request origin server HTTP response HTTP response" xmpDM:startTime="3847933" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Conditional GET cache server HTTP request msg If-modified-since: &lt;date&gt; HTTP response HTTP/1.0" xmpDM:startTime="3851867" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="304 Not Modified object not modified HTTP request msg If-modified-since: &lt;date&gt; HTTP response HTTP/1.0" xmpDM:startTime="3851867" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="200 OK &lt;data&gt; object modified" xmpDM:startTime="3851867" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="HTTP: Summary HTTP is a client-server protocol." xmpDM:startTime="3897700" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Uses text-based messages Web pages are generally written in HTML HTTP uses non-persistent/persistent TCP connections Cookies allow servers to maintain" xmpDM:startTime="3897700" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="state Proxy servers improve performance by caching frequently used pages Conditional gets allows proxy servers to reduce Internet traffic" xmpDM:startTime="3897700" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Homework 2A: HTTP [10 points] The text below shows the reply sent from the server in response to the HTTP" xmpDM:startTime="3948600" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="GET message." xmpDM:startTime="3948600" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Answer the following questions, indicating where in the message below you find the answer." xmpDM:startTime="3948600" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="HTTP/1.1" xmpDM:startTime="3948600" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="200 OK Date: Tue, 07 Mar 2019 12:39:45GMT Server: Apache/2.0.52" xmpDM:startTime="3948600" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="(Fedor) Last-Modified: Sat, 5 Jan 2019 18:27:46 GMT Etag: “526c3-f22-a88a4c80” Accept-ranges: bytes Content-Length: 4071 Keep-Alive: timeout=max=100 Connection: Keep-Alive Content-Type: text/html;" xmpDM:startTime="3948600" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="charset=ISO-8859-1 &lt;!doctype html publi “-//w3c//dtd html 4.0" xmpDM:startTime="3948600" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="transitional//en”&gt; &lt;html&gt; &lt;head&gt; &lt;much more document text following here (not shown)&gt; A." xmpDM:startTime="3948600" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Was the server able to successfully find the document or not? What time was the document reply provided? B." xmpDM:startTime="3948600" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="When was the document last modified? C." xmpDM:startTime="3948600" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="How many bytes are there in the document being returned? D." xmpDM:startTime="3948600" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="What are the first 5 bytes of the document being returned? E." xmpDM:startTime="3948600" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Did the server agree to a persistent connection?" xmpDM:startTime="3948600" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Lab 2A: Domains [10 points] Submit answers for the following: (See hints in the parenthesis.)" xmpDM:startTime="4018167" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Find the IP addresses of www.google.com" xmpDM:startTime="4018167" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="and www.yahoo.com" xmpDM:startTime="4018167" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="(ping) Modify the hosts file to map www.google.com" xmpDM:startTime="4018167" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="to yahoo’s IP address and ping to www.google.com." xmpDM:startTime="4018167" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Notice what address it is pinging to." xmpDM:startTime="4018167" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Remove the modification to the host file, open a new command window and repeat." xmpDM:startTime="4018167" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="(Windows: c:\windows\system32\drivers\etc\hosts) Find the domain name and country of 128.252.165.7" xmpDM:startTime="4018167" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="(http://www.webyield.net/domainquery.html" xmpDM:startTime="4018167" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name=") Find the owner of wustl.edu" xmpDM:startTime="4018167" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="domain (http://www.networksolutions.com/whois/index.jsp" xmpDM:startTime="4018167" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name=") Find the name server of wustl.edu" xmpDM:startTime="4018167" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="domain ( http://www.networksolutions.com/whois/index.jsp)" xmpDM:startTime="4018167" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="" xmpDM:startTime="4018167" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="computer-user Electronic Mail user mailbox outgoing message queue mail server user agent user agent user agent mail server user agent" xmpDM:startTime="4260867" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="user agent mail server user agent SMTP SMTP SMTP Alice user" xmpDM:startTime="4260867" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="SMTP Simple Mail Transfer Protocol Old Protocol: Allows only 7-bit ASCII messages All binary objects have to be converted to" xmpDM:startTime="4343367" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="ASCII Uses port 25 at the server" xmpDM:startTime="4343367" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Sample SMTP Exchange telnet mail.seas.wustl.edu" xmpDM:startTime="4401733" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="25 220 POSTOFFICE.seas.wustl.edu" xmpDM:startTime="4401733" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Microsoft ESMTP MAIL Service, Version: 6.0.3790.46" xmpDM:startTime="4401733" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="75 ready at Tue, 13 Sep 2011 18:34:56 -0500 HELO acm.org" xmpDM:startTime="4401733" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="250 POSTOFFICE.seas.wustl.edu" xmpDM:startTime="4401733" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Hello [128.252.19.232]" xmpDM:startTime="4401733" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="MAIL FROM: jain@acm.org" xmpDM:startTime="4401733" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="250 2.1.0" xmpDM:startTime="4401733" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="jain@acm.org....Sender" xmpDM:startTime="4401733" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="OK RCPT TO: jain@wustl.edu" xmpDM:startTime="4401733" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="250 2.1.5" xmpDM:startTime="4401733" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="jain@wustl.edu" xmpDM:startTime="4401733" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="DATA 354 Start mail input; end with &lt;CRLF&gt;.&lt;CRLF&gt;" xmpDM:startTime="4401733" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="This is test email." xmpDM:startTime="4401733" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="This serves as an exmaple for CS473 class." xmpDM:startTime="4401733" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="." xmpDM:startTime="4401733" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="250 2.6.0" xmpDM:startTime="4401733" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="&lt;MAIL2j97vPYGrN7kf0V00000aff@POSTOFFICE.seas.wustl.edu&gt;" xmpDM:startTime="4401733" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Queued mail for delivery QUIT 221 2.0.0" xmpDM:startTime="4401733" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="POSTOFFICE.seas.wustl.edu" xmpDM:startTime="4401733" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Service closing transmission channel Try the above client sequence by telnet mail.seas.wustl.edu" xmpDM:startTime="4401733" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="25 C: S: C: S: C: S: C: S: C: S: C: S: C: S:" xmpDM:startTime="4401733" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="HTTP vs." xmpDM:startTime="4613467" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="SMTP" xmpDM:startTime="4613467" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Mail Access Protocols SMTP can be used to send messages to destination user agent Þ Requires destination to be always" xmpDM:startTime="4636433" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="accessible Post Office Protocol - Version 3 (POP3) Internet Mail Access Protocol (IMAP) HTTP user agent sender’s mail server user" xmpDM:startTime="4636433" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="agent SMTP SMTP access protocol receiver’s mail server Alice Bob" xmpDM:startTime="4636433" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="POP3 protocol Authorization phase C: list S: 1 498 S: 2 912 S: ." xmpDM:startTime="4639700" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="C: retr 1 S: &lt;message 1 contents&gt; S: ." xmpDM:startTime="4639700" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="C: dele 1 C: retr 2 S: &lt;message 2 contents&gt; S: ." xmpDM:startTime="4639700" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="C: dele 2 C: quit S: +OK POP3 server signing off S: +OK POP3 server ready C: user bob S:" xmpDM:startTime="4639700" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="+OK C: pass hungry S: +OK user successfully logged on Transaction phase" xmpDM:startTime="4639700" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="IMAP Internet Mail Access Protocol More sophisticated than POP3 Allows users to maintain folders on the server Messages can be" xmpDM:startTime="4640700" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="moved from one folder to another Users can get only headers or other components of the message Official IMAP site:" xmpDM:startTime="4640700" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="www.imap.org" xmpDM:startTime="4640700" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="" xmpDM:startTime="4640700" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Mail: Summary SMTP is the protocol send email SMTP uses only 7-bit ASCII messages POP3, IMAP, or HTTP is used" xmpDM:startTime="4641667" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="to receive email" xmpDM:startTime="4641667" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Homework 2B: Mail [12 points] Consider accessing your e-mail with POP3." xmpDM:startTime="4642233" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="a) Suppose you have configured your POP mail client to operate in the download and delete mode." xmpDM:startTime="4642233" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Complete the following transaction to retrieve both messages, and sign off." xmpDM:startTime="4642233" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Show the complete sequence of messages." xmpDM:startTime="4642233" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="(Fill in ? and successive messages) C: list S: 1 500 S: 2 901 S: ." xmpDM:startTime="4642233" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="C: retr 1 S: blah blah … S: … Blah S: ." xmpDM:startTime="4642233" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="? ? b) Repeat part a if you have programmed your POP client in download and keep mode." xmpDM:startTime="4642233" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="c) Suppose five minutes later you again access POP to retrieve new e-mail." xmpDM:startTime="4642233" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Suppose that in the five-minute interval no new message have been sent to you." xmpDM:startTime="4642233" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Provide a transcript of this second POP session for both options a and b above." xmpDM:startTime="4642233" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="" xmpDM:startTime="4642233" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Mail: Summary SMTP is the protocol send email SMTP uses only 7-bit ASCII messages POP3, IMAP, or HTTP is used" xmpDM:startTime="4643400" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="to receive email" xmpDM:startTime="4643400" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="IMAP Internet Mail Access Protocol More sophisticated than POP3 Allows users to maintain folders on the server Messages can be" xmpDM:startTime="4643667" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="moved from one folder to another Users can get only headers or other components of the message Official IMAP site:" xmpDM:startTime="4643667" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="www.imap.org" xmpDM:startTime="4643667" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="" xmpDM:startTime="4643667" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="POP3 protocol Authorization phase C: list S: 1 498 S: 2 912 S: ." xmpDM:startTime="4643933" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="C: retr 1 S: &lt;message 1 contents&gt; S: ." xmpDM:startTime="4643933" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="C: dele 1 C: retr 2 S: &lt;message 2 contents&gt; S: ." xmpDM:startTime="4643933" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="C: dele 2 C: quit S: +OK POP3 server signing off S: +OK POP3 server ready C: user bob S:" xmpDM:startTime="4643933" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="+OK C: pass hungry S: +OK user successfully logged on Transaction phase" xmpDM:startTime="4643933" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Mail Access Protocols SMTP can be used to send messages to destination user agent Þ Requires destination to be always" xmpDM:startTime="4644467" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="accessible Post Office Protocol - Version 3 (POP3) Internet Mail Access Protocol (IMAP) HTTP user agent sender’s mail server user" xmpDM:startTime="4644467" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="agent SMTP SMTP access protocol receiver’s mail server Alice Bob" xmpDM:startTime="4644467" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="HTTP vs." xmpDM:startTime="4645200" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="SMTP" xmpDM:startTime="4645200" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Mail Access Protocols SMTP can be used to send messages to destination user agent Þ Requires destination to be always" xmpDM:startTime="4646233" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="accessible Post Office Protocol - Version 3 (POP3) Internet Mail Access Protocol (IMAP) HTTP user agent sender’s mail server user" xmpDM:startTime="4646233" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="agent SMTP SMTP access protocol receiver’s mail server Alice Bob" xmpDM:startTime="4646233" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="HTTP vs." xmpDM:startTime="4656867" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="SMTP" xmpDM:startTime="4656867" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Mail Access Protocols SMTP can be used to send messages to destination user agent Þ Requires destination to be always" xmpDM:startTime="4660633" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="accessible Post Office Protocol - Version 3 (POP3) Internet Mail Access Protocol (IMAP) HTTP user agent sender’s mail server user" xmpDM:startTime="4660633" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="agent SMTP SMTP access protocol receiver’s mail server Alice Bob" xmpDM:startTime="4660633" xmpDM:duration="1000"/></rdf:li></rdf:Seq>
                     </xmpDM:markers>
                  </rdf:Description>
               </rdf:li>
               <rdf:li>
                  <rdf:Description xmpDM:trackType="TableOfContents" xmpDM:frameRate="f1000" xmpDM:trackName="Table of Contents">
                     <xmpDM:markers>
                        <rdf:Seq>
                           <rdf:li><rdf:Description xmpDM:name="Application Layer" xmpDM:startTime="0" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="0" tscDM:imageoffset="0" tscDM:imagerect="0, 0, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Overview" xmpDM:startTime="5400" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="1" tscDM:imageoffset="0" tscDM:imagerect="75, 0, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Network Application Architectures" xmpDM:startTime="27467" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="2" tscDM:imageoffset="0" tscDM:imagerect="150, 0, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Protocol Layers" xmpDM:startTime="83067" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="3" tscDM:imageoffset="0" tscDM:imagerect="225, 0, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Network Application Architectures" xmpDM:startTime="137067" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="4" tscDM:imageoffset="0" tscDM:imagerect="300, 0, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Client-Server" xmpDM:startTime="144600" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="5" tscDM:imageoffset="0" tscDM:imagerect="375, 0, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Peer-to-Peer" xmpDM:startTime="203767" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="6" tscDM:imageoffset="0" tscDM:imagerect="450, 0, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Process Communications" xmpDM:startTime="419833" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="7" tscDM:imageoffset="0" tscDM:imagerect="525, 0, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Names, Addresses, Ports" xmpDM:startTime="604100" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="8" tscDM:imageoffset="0" tscDM:imagerect="600, 0, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Process Communications" xmpDM:startTime="724433" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="9" tscDM:imageoffset="0" tscDM:imagerect="675, 0, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Names, Addresses, Ports" xmpDM:startTime="827400" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="10" tscDM:imageoffset="0" tscDM:imagerect="750, 0, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Transports" xmpDM:startTime="981367" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="11" tscDM:imageoffset="0" tscDM:imagerect="825, 0, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Application Layer Protocols" xmpDM:startTime="1303033" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="12" tscDM:imageoffset="0" tscDM:imagerect="900, 0, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Transports" xmpDM:startTime="1307433" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="13" tscDM:imageoffset="0" tscDM:imagerect="975, 0, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Application Layer Protocols" xmpDM:startTime="1308400" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="14" tscDM:imageoffset="0" tscDM:imagerect="1050, 0, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Application Arch: Summary" xmpDM:startTime="1430567" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="15" tscDM:imageoffset="0" tscDM:imagerect="1125, 0, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="HTTP" xmpDM:startTime="1471467" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="16" tscDM:imageoffset="0" tscDM:imagerect="1200, 0, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="HTTP Concepts" xmpDM:startTime="1485433" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="17" tscDM:imageoffset="0" tscDM:imagerect="1275, 0, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="HTTP" xmpDM:startTime="1641767" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="18" tscDM:imageoffset="0" tscDM:imagerect="1350, 0, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Sample Web Page" xmpDM:startTime="1853600" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="19" tscDM:imageoffset="0" tscDM:imagerect="1425, 0, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Sample HTTP Request Message" xmpDM:startTime="1983800" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="20" tscDM:imageoffset="0" tscDM:imagerect="1500, 0, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="HTTP Request Message Format" xmpDM:startTime="2320367" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="21" tscDM:imageoffset="0" tscDM:imagerect="1575, 0, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Sample HTTP Response Message" xmpDM:startTime="2523700" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="22" tscDM:imageoffset="0" tscDM:imagerect="1650, 0, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="HTTP Request Message Format" xmpDM:startTime="2649333" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="23" tscDM:imageoffset="0" tscDM:imagerect="1725, 0, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Sample HTTP Request Message" xmpDM:startTime="2650500" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="24" tscDM:imageoffset="0" tscDM:imagerect="1800, 0, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="HTTP Request Message Format" xmpDM:startTime="2665633" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="25" tscDM:imageoffset="0" tscDM:imagerect="1875, 0, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Sample HTTP Response Message" xmpDM:startTime="2665900" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="26" tscDM:imageoffset="0" tscDM:imagerect="1950, 0, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="HTTP Request Message Format" xmpDM:startTime="2689567" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="27" tscDM:imageoffset="0" tscDM:imagerect="2025, 0, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Sample HTTP Request Message" xmpDM:startTime="2690033" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="28" tscDM:imageoffset="0" tscDM:imagerect="2100, 0, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Sample Web Page" xmpDM:startTime="2690233" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="29" tscDM:imageoffset="0" tscDM:imagerect="2175, 0, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Sample HTTP Request Message" xmpDM:startTime="2691767" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="30" tscDM:imageoffset="0" tscDM:imagerect="2250, 0, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="HTTP Request Message Format" xmpDM:startTime="2769533" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="31" tscDM:imageoffset="0" tscDM:imagerect="2325, 0, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Sample HTTP Response Message" xmpDM:startTime="2790800" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="32" tscDM:imageoffset="0" tscDM:imagerect="2400, 0, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="HTTP Response Message Format" xmpDM:startTime="2797533" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="33" tscDM:imageoffset="0" tscDM:imagerect="2475, 0, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Sample HTTP Response Message" xmpDM:startTime="2814300" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="34" tscDM:imageoffset="0" tscDM:imagerect="2550, 0, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="HTTP Request Message Format" xmpDM:startTime="2919300" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="35" tscDM:imageoffset="0" tscDM:imagerect="2625, 0, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Sample HTTP Request Message" xmpDM:startTime="2920467" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="36" tscDM:imageoffset="0" tscDM:imagerect="2700, 0, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="HTTP Request Message Format" xmpDM:startTime="2932600" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="37" tscDM:imageoffset="0" tscDM:imagerect="2775, 0, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Sample HTTP Response Message" xmpDM:startTime="2932967" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="38" tscDM:imageoffset="0" tscDM:imagerect="2850, 0, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="HTTP Response Message Format" xmpDM:startTime="2966600" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="39" tscDM:imageoffset="0" tscDM:imagerect="2925, 0, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Hands-on HTTP" xmpDM:startTime="2969300" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="40" tscDM:imageoffset="0" tscDM:imagerect="3000, 0, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="HTTP Response Message Format" xmpDM:startTime="3108300" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="41" tscDM:imageoffset="0" tscDM:imagerect="3075, 0, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Sample HTTP Response Message" xmpDM:startTime="3108767" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="42" tscDM:imageoffset="0" tscDM:imagerect="3150, 0, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="HTTP Response Message Format" xmpDM:startTime="3110000" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="43" tscDM:imageoffset="0" tscDM:imagerect="3225, 0, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Sample HTTP Response Message" xmpDM:startTime="3111133" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="44" tscDM:imageoffset="0" tscDM:imagerect="3300, 0, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="HTTP Request Message Format" xmpDM:startTime="3111533" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="45" tscDM:imageoffset="0" tscDM:imagerect="3375, 0, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Sample HTTP Response Message" xmpDM:startTime="3114333" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="46" tscDM:imageoffset="0" tscDM:imagerect="3450, 0, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="HTTP Response Message Format" xmpDM:startTime="3115033" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="47" tscDM:imageoffset="0" tscDM:imagerect="3525, 0, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Hands-on HTTP" xmpDM:startTime="3120167" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="48" tscDM:imageoffset="0" tscDM:imagerect="3600, 0, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Hands-on HTTP (cont)" xmpDM:startTime="3221267" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="49" tscDM:imageoffset="0" tscDM:imagerect="3675, 0, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Cookies" xmpDM:startTime="3379000" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="50" tscDM:imageoffset="0" tscDM:imagerect="3750, 0, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Proxy Server: Web Caching" xmpDM:startTime="3706800" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="51" tscDM:imageoffset="0" tscDM:imagerect="3825, 0, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Cookies" xmpDM:startTime="3790333" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="52" tscDM:imageoffset="0" tscDM:imagerect="3900, 0, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Hands-on HTTP (cont)" xmpDM:startTime="3790767" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="53" tscDM:imageoffset="0" tscDM:imagerect="50, 56, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Hands-on HTTP" xmpDM:startTime="3796933" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="54" tscDM:imageoffset="0" tscDM:imagerect="125, 56, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="HTTP Response Message Format" xmpDM:startTime="3799300" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="55" tscDM:imageoffset="0" tscDM:imagerect="200, 56, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Hands-on HTTP" xmpDM:startTime="3846100" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="56" tscDM:imageoffset="0" tscDM:imagerect="275, 56, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Hands-on HTTP (cont)" xmpDM:startTime="3846700" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="57" tscDM:imageoffset="0" tscDM:imagerect="350, 56, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Cookies" xmpDM:startTime="3847200" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="58" tscDM:imageoffset="0" tscDM:imagerect="425, 56, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Proxy Server: Web Caching" xmpDM:startTime="3847933" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="59" tscDM:imageoffset="0" tscDM:imagerect="500, 56, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Conditional GET" xmpDM:startTime="3851867" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="60" tscDM:imageoffset="0" tscDM:imagerect="575, 56, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="HTTP: Summary" xmpDM:startTime="3897700" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="61" tscDM:imageoffset="0" tscDM:imagerect="650, 56, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Homework 2A: HTTP" xmpDM:startTime="3948600" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="62" tscDM:imageoffset="0" tscDM:imagerect="725, 56, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Lab 2A: Domains" xmpDM:startTime="4018167" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="63" tscDM:imageoffset="0" tscDM:imagerect="800, 56, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Electronic Mail" xmpDM:startTime="4260867" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="64" tscDM:imageoffset="0" tscDM:imagerect="875, 56, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="SMTP" xmpDM:startTime="4343367" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="65" tscDM:imageoffset="0" tscDM:imagerect="950, 56, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Sample SMTP Exchange" xmpDM:startTime="4401733" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="66" tscDM:imageoffset="0" tscDM:imagerect="1025, 56, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="HTTP vs. SMTP" xmpDM:startTime="4613467" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="67" tscDM:imageoffset="0" tscDM:imagerect="1100, 56, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Mail Access Protocols" xmpDM:startTime="4636433" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="68" tscDM:imageoffset="0" tscDM:imagerect="1175, 56, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="POP3 protocol" xmpDM:startTime="4639700" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="69" tscDM:imageoffset="0" tscDM:imagerect="1250, 56, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="IMAP" xmpDM:startTime="4640700" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="70" tscDM:imageoffset="0" tscDM:imagerect="1325, 56, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Mail: Summary" xmpDM:startTime="4641667" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="71" tscDM:imageoffset="0" tscDM:imagerect="1400, 56, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Homework 2B: Mail" xmpDM:startTime="4642233" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="72" tscDM:imageoffset="0" tscDM:imagerect="1475, 56, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Mail: Summary" xmpDM:startTime="4643400" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="73" tscDM:imageoffset="0" tscDM:imagerect="1550, 56, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="IMAP" xmpDM:startTime="4643667" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="74" tscDM:imageoffset="0" tscDM:imagerect="1625, 56, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="POP3 protocol" xmpDM:startTime="4643933" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="75" tscDM:imageoffset="0" tscDM:imagerect="1700, 56, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Mail Access Protocols" xmpDM:startTime="4644467" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="76" tscDM:imageoffset="0" tscDM:imagerect="1775, 56, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="HTTP vs. SMTP" xmpDM:startTime="4645200" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="77" tscDM:imageoffset="0" tscDM:imagerect="1850, 56, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Mail Access Protocols" xmpDM:startTime="4646233" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="78" tscDM:imageoffset="0" tscDM:imagerect="1925, 56, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="HTTP vs. SMTP" xmpDM:startTime="4656867" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="79" tscDM:imageoffset="0" tscDM:imagerect="2000, 56, 75, 56"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Mail Access Protocols" xmpDM:startTime="4660633" tscDM:image="i_2app1_Thumbnails.png" tscDM:imageindex="80" tscDM:imageoffset="0" tscDM:imagerect="2075, 56, 75, 56"/></rdf:li></rdf:Seq>
                     </xmpDM:markers>
                  </rdf:Description>
               </rdf:li>
            </rdf:Bag>
         </xmpDM:Tracks>
         <tscDM:controller>
            <rdf:Description xmpDM:name="tscplayer">
               <tscDM:parameters>
                  <rdf:Bag>
                     <rdf:li xmpDM:name="autohide" xmpDM:value="false"/><rdf:li xmpDM:name="autoplay" xmpDM:value="true"/><rdf:li xmpDM:name="loop" xmpDM:value="false"/><rdf:li xmpDM:name="searchable" xmpDM:value="true"/><rdf:li xmpDM:name="captionsenabled" xmpDM:value="false"/><rdf:li xmpDM:name="sidebarenabled" xmpDM:value="false"/><rdf:li xmpDM:name="unicodeenabled" xmpDM:value="false"/><rdf:li xmpDM:name="backgroundcolor" xmpDM:value="000000"/><rdf:li xmpDM:name="sidebarlocation" xmpDM:value="left"/><rdf:li xmpDM:name="endaction" xmpDM:value="stop"/><rdf:li xmpDM:name="endactionparam" xmpDM:value="true"/><rdf:li xmpDM:name="locale" xmpDM:value="en-US"/></rdf:Bag>
               </tscDM:parameters>
               <tscDM:controllerText>
                  <rdf:Bag>
                  </rdf:Bag>
               </tscDM:controllerText>
            </rdf:Description>
         </tscDM:controller>
         <tscDM:contentList>
            <rdf:Description>
               <tscDM:files>
                  <rdf:Seq>
                     <rdf:li xmpDM:name="0" xmpDM:value="i_2app1.mp4"/><rdf:li xmpDM:name="1" xmpDM:value="i_2app1_First_Frame.png"/><rdf:li xmpDM:name="2" xmpDM:value="i_2app1_Thumbnails.png"/></rdf:Seq>
               </tscDM:files>
            </rdf:Description>
         </tscDM:contentList>
      </rdf:Description>
   </rdf:RDF>
</x:xmpmeta>