MSIS 8040/01 Data Communication Theory and Practice, Summer 2005

Assignment 3, due on 06/21/05

Solve the problems on p.234: 8.3, 8.5, 8.6, 8.7 and the following questions

8.3 What is the difference between the subnet mask for a Class A address with 16 bits for the subnet ID and a class B address with 8 bits for the subnet ID?

8.5 Given a network address of 192.168.100.0 and a subnet mask of 255.255.255.192,

1. How many subnets are created?
2. How many hosts are there per subnet?

8.6 Given a company with six individual departments and each department having ten computers or networked devices, what mask could be applied to the company network to provide the subnetting necessary to divide up the network equally?

8.7 In contemporary routing and addressing, the notation commonly used is called classless interdomain routing or CIDR. With CIDR, the number of bits in the mask is indicated in the following fashon: 192.168.100.0/24. This corresponds to a mask of 255.255.255.0. If this example would provide for 256 host addresses on the network, how many address are provided with the following?

1. 192.168.100.0/23
2. 192.168.100.0/25

1. A company has a class B address space and wants to define 8 subnets using this address space. The dotted quad for the address is 131.10.0.0. What is the subnet mask for this?

2. A network node has an IP address of 203.149.55.79. The network’s subnet mask is 255.255.255.192. What IPv4 network class is the node’s network? What is the node’s subnet value (subnet address)? What is the node’s host address within the subnet?

3. Given an IP address 192.210.165.13 with subnet mask of 255.255.255.248. What are its subnet address and its node address?