COMP3250 - Computer Networks - IT Assignment Help

Assignment Task

Objectives
This assignment will test your knowledge in the following areas:
• Intra-Domain Routing.
• Classless Interdomain Routing (CIDR).
• Route Aggregation.
• BGP.

Assignment Type: Problem Solving (Individual Assignment)
The purpose of the problem-solving assignment is to help the students to get accustomed to dealing with real world problem situations/issues. It is designed to help students analyse a particular problem and find its best solution.

Questions
1. Distance Vector protocol’s convergence around routing failures tends to be slow. During the course of time, several modifications were made to the protocol to address this issue. Identify and briefly explain 3 such modifications which aim to improve the convergence property of this class of protocols.

2. The flooding mechanism in OSPF is considered to be reliable enough to withstand errors such as link and router failures. Give and explain two reasons why it is so.

3. Does the aging mechanism used in the OSPF protocol require the use of clocks that are synchronized? Explain why or why not with suitable examples.

4. Summarize the following range of IP addresses given below.
(Starting with X.Y.96.0 and ending with X.Y.159.0). Explain clearly how you arrive at the solution showing all relevant steps.
194.1.96.0/24
194.1.97.0/24
194.1.98.0/24
: :
: :
194.1.126.0/24
194.1.127.0/24
194.1.128.0/24
: :
: :
194.1.158.0/24
194.1.159.0/24

5. Consider the Backbone network topology shown in figure 1 below consisting of a backbone and an aggregation layer. The backbone layer forms an Autonomous System (AS) - AS1000 and the aggregation layer forms an Autonomous System - AS2000. The two ASes communicate with each other using BGP (external BGP) routes. The IGP protocol deployed within the two ASs is OSPF. Explain how the following requirements can be met:
o Devices on the aggregation layer are not expected to know internal route details of the backbone layer.
- Low end performance devices reside in the aggregation layer and consequently these devices are not expected to process a large number of BGP routes emanating from the backbone layer.

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