RECENT ASSIGNMENT

Question 1
Describe the differences between a repeater, a switch and a router. Why is a router generally more expensive and complex than a switch, and why is a switch generally more complex and expensive than a repeater? [5 marks].
Question 2
(Show your working and give a short explanation for each answer.)
Designing IP Addressing schemes and configuring IP Addressing is a common activity undertaken by network engineers. Consider an ISP is granted a block of addresses starting with 150.80.0.0/16. The ISP needs to distribute these blocks to 2600 customers as follows:[7 marks]
a. The first group has 200 medium-size businesses; each needs approximately 128 addresses.
b. The second group has 400 small-size businesses; each needs approximately 16 addresses.
c. The third group has 2000 households; each needs 4 addresses.
Design the sub blocks and give the slash notation for each sub block. Find out how many addresses are still available after these allocations.
Question 3
Consider the diagram below. Which of the two central routers (R1 and R2) is more critical for network operations and why? [3 marks]

Question 4
Contrast and compare distance vector routing with link state routing.[5 marks]
Question 5
Discuss the role ICMP plays in extending the IP protocol architecture? Looking into the structure of the error reporting ICMP messages, what is the purpose of including the IP header and first 8 bytes of datagram data? [ 10 marks]