Handout #15: CS 326e S2004 Pre-lab

Pre-Lab #1: Basic LAN Setup & Trace analysis using Ethereal


A completed pre-lab needs to be turned in at the beginning of the lab session and you should bring your lab handout with you.

0.  PLEASE SIGN UP FOR YOUR 2-hr LAB timeslot TODAY!!!!
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On the site, click on “Students” and then on “Sign-up”
Copies of the pre-lab (handout #15) and lab(handout #14) are available on the class hmwkFAQ case you lose your copy.
Lab Sessions are Thursday March 4 thru Thursday March 11.

1.  Read: a) the lab handout, and b) the following pages in the text: pg 463-465, 474, 476, 673, 4.4.5, 4.4.6, pg 322-325, figures 3.38, 3.39

2.  What is a Register Jack (RJ)-45?

3.  Ethernet Switches do not have IP addresses. Why?

4.  What is the purpose of the DHCP protocol?

5.  The "ping" application is built on top of a specific protocol (hint: it's not TCP, UDP, or IP). What is it?

6.  Give one example when "ping" can be used to troubleshoot network problems.

7.  Given the range of Class C IP Addresses,
a) what is the smallest valid Class C address
b) what is the largest valid Class C address

8.  If a class B address is a 16-bit network # and 16-bit host #, then what is the value of its subnet mask (in dotted decimal notation)? (Hint: the text calls this a network mask and uses /n to indicate that the mask contains n bits that are all 1. The Class C address network mask in the book is /24 and is written in dotted decimal notation as 255.255.255.0)

  1. Draw a diagram of the network topology that you will have built in TASK 4 (see figure 5.34 in the text). Then draw a diagram of the network topology after TASK 5.

10.  What does Ethereal do? (hint: look up http://www.ethereal.com) Also, browse the user guide: www.ethereal.com/docs/user-guide/ , particularly Chapter 3.

11.  List 3 protocols that we have discussed that Ethereal can decode.

12.  Write the TCP nicknames for the control segments that establish a connection and also the control segments that close a connection (see figures 3.38, 3.39)