Homework 2 (Due Nov. 10, turn in at class time and in hardcopies)

1. You have 5 subnets with the following numbers of hosts on them: 58, 14, 29, 49, and 3, and you are given the address space 10.1.1.0/24. Determine how you could divide the address space given into subnets so these hosts fit into it.

2. Assume an ATM buffer of 200 cells which can serve at rate c=10000 cells/s which is fed with ATM AAL5 packets each of which can be fragmented into exactly 20 cells. Assume the packet arrival process is Poisson with rate r (packets/sec) and the cell arrival process for a given packet is also Poisson with rate c/100. After a packet arrives when 20 such cells arrive, the packet is over. The load on the buffer is arrival rate / service rate = 20*r/c and is denoted by a. Plot the packet success probability as a function of a in case

o Tail drop is used,

o Early packet discard with new packets discarded when the buffer contains 100 cells.

Provide the graph as well as the simulation code with all the comments and explanations made for me to understand the code.