Lab 10.3.5d Subnetting a Class C Network
Objective
The objective of this lab is to provide a subnetting scheme using a Class C network.
Background / Preparation
This is a written exercise and is to be performed without the aid of an electronic calculator.
The Classical Academy has acquired a Class C address, 192.168.1.0. The academy needs to
create subnets to provide low level security and broadcast control on the LAN. It is not necessary
to supply an address for the WAN connection. It is supplied by the Internet service provider.
The LAN consists of the following, each of which will require its own subnet:
Classroom #1 28 nodes
Classroom #2 22 nodes
Computer lab 30 nodes
Instructors 12 nodes
Administration 8 nodes
Step 1 Given this Class C network address and these requirements answer the
following
questions
How many subnets are needed for this network? 5
What is the subnet mask for this network?
1. Dotted decimal 255.255.255.224
2. Binary 11111111 11111111 11111111 11100000
3. Slash format /27
How many usable hosts are there per subnet? 25 – 2 or 30
Step 2 Complete the following chart
Subnetwork #
0 192.168.1.0
1 192.168.1.32
2 192.168.1.64
3 192.168.1.96
4 192.168.1.128
5 192.168.1.160
6 192.168.1.192
7 192.168.1.224
Subnetwork IP Host Range
192.168.1.1-192.168.1.30
192.168.1.33-192.168.1.62
192.168.1.65-192.168.1.94
192.168.1.97-192.168.1.126
192.168.1.129-192.168.1.158
192.168.1.161-192.168.1.190
192.168.1.193-192.168.1.222
192.168.1.225-192.168.1.254
Broadcast ID
192.168.1.31
192.168.1.63
192.168.1.95
192.168.1.127
192.168.1.159
192.168.1.191
192.168.1.223
192.168.1.255
What is the host range for subnet six? 192.168.1.193-192.168.1.222
What is the broadcast address for the 3rd subnet? 192.168.1.127
What is the broadcast address for the major network? 192.168.1.255
Lab 10.3.5c Subnetting a Class B Network
Objective
The objective of this lab is to provide a subnetting scheme using a Class B network
Background / Preparation
This is a written lab and is to be performed without the aid of an electronic calculator.
ABC Manufacturing has acquired a Class B address, 172.16.0.0. The company needs to create a
subnetting scheme to provide the following:
36 subnets with at least 100 hosts
24 subnets with at least 255 hosts
10 subnets with at least 50 hosts
It is not necessary to supply an address for the WAN connection since it is supplied by the
Internet
service provider.
Step 1 Given this Class B network address and these requirements answer the
following questions
How many subnets are needed for this network? 70
What is the minimum number of bits that can be borrowed? 7
What is the subnet mask for this network?
1. Dotted decimal 255.255.254.0
2. Binary 11111111 11111111 11111110 00000000
3. Slash format /23
How many usable subnetworks are there? 27-2 or 126
How many usable hosts are there per subnet? 29-2 or 510
Step 2 Complete the following chart listing the first three subnets and the last 4
subnets
# Subnetwork
1 172.16.2.0
2 172.16.4.0
3 172.16.6.0
123 172.16.246.0
124 172.16.248.0
125 172.16.250.0
126 172.16.252.0
Subnetwork ID Host Range
172.16.2.1-172.16.3.254
172.16.4.1-172.16.5.254
172.16.6.1-172.16.7.254
172.16.246.1-172.16.247.254
172.16.248.1-172.16.249.254
172.16.250.1-172.16.251.254
172.16.252.1-172.16.253.254
Broadcast ID
172.16.3.255
172.16.5.255
172.16.7.255
172.16.247.255
172.16.249.255
172.16.251.255
172.16.253.255
What is the host range for subnet two? 172.16.4.1-172.16.5.254
What is the broadcast address for the 126th subnet? 172.16.253.255
What is the broadcast address for the major network? 172.16.255.255