S-38.2188 Communication Networks (Spring 2006)

Project work part 1 FAQ

Exercise 2: The propagation speed of the signal is same as in exercise 1.

Exercise 3: Although you are asked to select a host from each continent, you can disregard Antarctica.

Exercise 3: If you have trouble reaching the hosts with ping and/or traceroute, try universities which are usually easier to reach. (www.mit.edu, www.kth.se for example)

Exercise 7: With X=10 there are in some cases two least cost paths with the same cost. In this case you can either consider that the traffic chooses randomly which path it takes, or that half the traffic is routed one path and the other half via the other path.

Where to find material for the exercises in course book (Kurose & Ross: Computer Networking), last year´s course book (Peterson & Davie: Computer Networks) or lecture slides:

Question	Course book	Last years book	Lecture slides
1-2	chapters 1-2	chapter 1.1.4	slides1
5	chapter 3.4	chapter 2.5	slides 1-2
6-7	chapter 4.5.1	chapter 4.2	slides 4
8	chapter 4.4	chapters 4.1.3 & 4.3	slides 4

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