CSE logo University of Washington Computer Science & Engineering
 CSE 461: Computer Communication and Networks (Winter 2007)
  CSE Home   About Us    Search    Contact Info 

Course home
 Home
Administrivia
 Overview
 Using course email
 Email archive
Schedule
 Lectures and readings
 Section and tutorials
 Midterms and exams
Assignments
 Homework
 Projects
Lab information
 Getting lab accounts
 Unix tutorials
   

Homework 2

Textbook problems:

 2.50, 2.58.

Playing with ping:

      Use the ping command to measure and report the average round trip
      time between attu.cs.washington.edu and the following machines:

        (a) www.cs.washington.edu
        (b) www.cs.berkeley.edu
        (c) www.cs.yale.edu
        (d) www.cs.monash.edu.au

      For each, estimate the physical distance between attu and the
      destination.  Calculate the speed-of-light round-trip delay
      given this distance.  At what fraction of the speed of light did
      your ping packets travel, for each?

traceroute problem:

    Use "traceroute" to determine the path taken between 
    attu.cs.washington.edu and www.japantimes.co.jp.  From its
    output, using your powers of sleuthing, google, and best guesses,
    describe the geographical path the packets take -- cities and countries.

CSE logo Computer Science & Engineering
University of Washington
Box 352350
Seattle, WA  98195-2350
(206) 543-1695 voice, (206) 543-2969 FAX