12 May CSC3407 Assignment 1, S1 2014 CSC3407 Assignment 1 S1 2
CSC3407 Assignment 1, S1 2014 CSC3407 Assignment 1 S1 2014 Due date: 11 April 2014, Friday Full Mark for this assignment: 100 Weighting: 25% of the course mark Submission Requirements: ? Complete the assignment yourself. ? Submit your assignment on-line via the submission link in the course web page. ? Submit Packet Tracer files produced by Packet Tracer version 6.0.1. No other version of Packet Tracer files will be accepted. ? Submit a PDF containing all the answers (except Packet Tracer files) and screen dumps. No other format is accepted. ? Do not zip or archive your files. ? Show your working wherever possible. Question 1 (5 marks) What are the benefits of using a layered model for computer networks? Question 2 (10 marks) The three network topologies shown below are all valid Ethernet networks. a) How many collision domains and broadcast domains are there in each topology? b) Explain which topology is preferred. Question 3 (10 marks) Explain why 60.61.62.63/26 is not a valid host IP address. Topology 1 Topology 2 Topology 3 CSC3407 Assignment 1, S1 2014 Question 4 (10 marks) In the following network topology, assume static routes are set and the routers are working properly. Explain why PC A can talk to PC C but PC B cannot talk to PC D. Question 5 (65 marks) USQ has allocated 172.17.0.0/16 to 6 PC laboratories in Wonderland campus. Each laboratory will have a subnet of its own. The number of hosts in each laboratory is as follows: Lab 1 Subnet A Lab 2 Subnet B Lab 3 Subnet C Lab 4 Subnet D Lab 5 Subnet E Lab 6 Subnet F Number of Hosts 2 47 532 6 39 125 The hosts in each laboratory are linked together using switches. The six laboratories are linked together using a router with six Ethernet interfaces as shown below. In the topology, only two hosts in each laboratory are shown. For each subnet, the gateway will use the first host IP address. The two PCs (for example, PC_B1 and PC_B2) in each subnet shown will be using the second available host IP address and…
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