This preview shows pages 1–2. Sign up to view the full content.
CS 453: Networks Fall 2009
Homework 5
Instructor: V. Arun
Assigned:
11/16/09, Due:
11/25/09
Note: Please show as much of your work as you can.
Whenever possible, use variable names
before plugging in numerical values
. Even if you get the answer wrong, you can get partial
credit if you show your approach clearly. It will help us tell you where you made a mistake. If
you plug in numbers right upfront and your answer is wrong, you will not get partial credit.
Problem 1 (Interdomain routing quickies, 32 points):
Consider the AS topology in slide 4
101 (or Figure 432 in the textbook). Answer the following questions with an explanation for
each.
A.
Suppose router 3a advertises the route [AS3 AS5 AS7] for the prefix 128.119.240/24
and router 2a advertises the route [AS2 AS9 AS13] for the same prefix. What is the AS
level route chosen by router 1d to reach the prefix assuming that AS1 uses RIP for
intradomain routing and is a customer of both AS2 and AS3?
B.
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
This is the end of the preview. Sign up
to
access the rest of the document.
 Fall '09

Click to edit the document details