Network Trace of Web Page Access

This is a formatted display of information taken from a network trace.   During this trace a Web browser is used to access a web page.  You can view the web page being accessed during the trace (minus a graphic image or two).  Viewing the formatted page can be helpful to see the results of this network activity.  The trace data comes from the CD-ROM by Ralph Droms in the book "Computer Networks and Internets" by Douglas E. Comer, 1997 by Prentice Hall.

Each record is numbered by it appearance on the network. The time the record was transmitted is shown in seconds relative to the start of the transaction. "C:1650 S:80" represents data from Client port 1650 being sent to the Server at port 80. Selected portions of the data are displayed in the trace. 

record 1 at 0.000000 C:1650 S:80 data length 0 Establishment of a TCP connection

record 2 at 0.002750 S:80 C:1650 data length 0

record 3 at 0.056907 C:1650 S:80 data length 0

record 4 at 0.090426 C:1650 S:80 data length 261 Request for home page

GET / HTTP/1.0

file:///Duo HD/System Folder/Preferences/Netscape/Bookmarks.html

Connection: Keep-Alive

User-Agent: Mozilla/2.01 (Macintosh;I; 68K)

Host: www.bucknell.edu

Accept: image/gif, image/x-xbitmap, image/jpegimage/pjpeg, etc.

record 5 at 0.348709 S:80 C:1650 data length 0 Ack

record 6 at 0.376743 S:80 C:1650 data length 174 HTTP header for home page

HTTP/1.0 200 Document follows

Date: Tue, 21 May 1996 13:23:28 GMT

Server: NCSA/.5

Content-type: text/html

Last-modified: Mon, 26 Feb 1996 23:48:11 GMT

Content length: 2316

record 7 at 0.380717 S:80 C:1650 data length 1460 Part 1 of the home page html

<TITLE>Bucknell Home Page</TITLE><body background="http://www.bucknell.edu/textures/background"> <TABLE BORDER=5 width=100%><TR><TD valign=middle align=center><IMG alt="Bucknell logo" SRC="/gifs/Bucknell.gif"> </TD><TD VALIGN=center align=center>.<HR SIZE=3 WIDTH=80%><B><font size = +5> <IMG hspace=10 align=left SRC="/gifs/reddot.gif"><a href="departments/admissions/bucknell"> etc.

record 8 at 0.381310 S:80 C:1650 data length 856 Part 2 of the home page html

many of the individual faculty and staff home pages</td></tr><tr><td><p><IMG hspace=10 align=left SRC="/gifs/reddot.gif"><a.href="Publications.html"> Publications</A><br>On-Line versions of some the university's publications are accessedhere, as well as the campus radio station and several reports and studies. </td></tr><tr><td><p>.<IMG hspace=10 align=left SRC="/gifs/reddot.gif"> etc.

record 9 at 0.381535 S:80 C:1650 data length 0

record 10 at 0.386992 C:1650 S:80 data length 0

record 11 at 0.387510 C:1650 S:80 data length 0

record 12 at 1.400377 C:1651 S:80 data length 0 Establishment of a TCP connection

record 13 at 1.404789 S:80 C:1651 data length 0

record 14 at 1.262497 C:1651 S:80 data length 0

record 15 at 1.364130 C:1650 S:80 data length 0

record 16 at 1.366437 S:80 C:1650 data length 0


record 17 at 1.665817 C:1652 S:80 data length 0 Establishment of a TCP connection

record 18 at 1.670129 S:80 C:1652 data length 0

record 19 at 1.725295 C:1652 S:80 data length 0

record 20 at 1.804211 C:1652 S:80 data length 225 Request for logo graphics image

GET /gifs/Bucknell.gif HTTP/1.0

Referer: http://www.bucknell.edu/

Connection: Keep-Alive

User-Agent: Mozilla/2.01 (Macintosh; I; 68K)

Host: www.bucknell.edu

Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg

record 21 at 1.842171 S:80 C:1652 data length 174 Header for logo graphic file

HTTP/1.0 200 Document follows.

Date: Tue, 21 May 1996 13:23:30 GMT

Server: NCSA/.5

Content-type: image/gif

Last-modified: Mon, 14 Aug 1995 13:00:06 GMT

Content length: 1888

record 22 at 1.845675 S:80 C:1652 data length 1460 transmission of graphics file (not shown)

record 24 at 1.850248 C:1652 S:80 data length 0

record 25 at 1.852792 S:80 C:1652 data length 0

record 26 at 1.854721 C:1652 S:80 data length 0

record 27 at 3.391983 C:1651 S:80 data length 227 Request for the graphic to be used as the background texture

GET /textures/background HTTP/1.0

Referer: http://www.bucknell.edu/

Connection: Keep-Alive

User-Agent: Mozilla/2.01 (Macintosh; I; 68K)

Host: www.bucknell.edu

Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg etc.

record 28 at 3.226924 S:80 C:1651 data length 175 header for the background graphics file

HTTP/1.0 200 Document follows

Date: Tue, 21 May 1996 13:23:31 GMT

Server: NCSA/.5

Content-type: text/plain

Last-modified: Thu, 20 Apr 1995 14:20:20 GMT

Content-length: 2316

record 29 at 3.230857 S:80 C:1651 data length 1460 transmission of background graphics (data not shown)

record 30 at 3.231576 S:80 C:1651 data length 856

record 31 at 3.231911 S:80 C:1651 data length 0

record 32 at 3.238603 C:1651 S:80 data length 0

record 33 at 3.239116 C:1651 S:80 data length 0

record 34 at 5.363383 C:1651 S:80 data length 0

record 35 at 5.365430 S:80 C:1651 data length 0

record 36 at 5.765306 C:1653 S:80 data length 0

record 37 at 5.767632 S:80 C:1653 data length 0


record 38 at 5.785804 C:1653 S:80 data length 223 Request for the red dot graphic used as bullet in the table

GET /gifs/reddot.gif HTTP/1.0

Referer: http://www.bucknell.edu/

Connection: Keep-Alive

User-Agent: Mozilla/2.01 (Macintosh; I; 68K)

Host: www.bucknell.edu

Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg etc.

record 39 at 5.808757 S:80 C:1653 data length 173 Header for the red dot graphic

HTTP/1.0 200 Document follows

Date: Tue, 21 May 1996 13:23:34 GMT

Server: NCSA/.5

Content-type: image/gif

Last-modified: Mon, 14 Aug 1995 13:00:17 GMT

Content length: 898

record 40 at 5.811205 S:80 C:1653 data length 898 transmission of the red dot graphic (not shown)

record 41 at 5.812934 S:80 C:1653 data length 0

record 42 at 5.814512 C:1653 S:80 data length 0

record 43 at 5.816047 C:1653 S:80 data length 0

record 44 at 6.346904 C:1652 S:80 data length 0

record 45 at 6.349612 S:80 C:1652 data length 0

record 46 at 8.092880 C:1653 S:80 data length 0

record 47 at 8.094940 S:80 C:1653 data length 0

record 48 at 16.057160 C:1654 S:80 data length 0

record 49 at 16.059894 S:80 C:1654 data length 0

 

record 944 at 228.333097 C:1693 S2:80 data length 260 Request using the "If-Modified-Since" clause

GET /~droms/netbook/ HTTP/1.0

If-Modified-Since: Tuesday, 14-May-96 01:48:10 GET; length=735

Connection: Keep-Alive

User-Agent: Mozilla/2.01 (Macintosh; I; 8K)

Host: www.eg.bucknell.edu..Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, */*

record 945 at 228.378895 S2:80 C:1693 data length 0

record 946 at 228.538411 S2:80 C:1693 data length 82 Response indicating cached version of the file is current

HTTP/1.0 304 Not modified

Date: Tue, 21 May 1996 13:27:17 GMT

Server: NCSA/1.4.