Information Technology Reference
In-Depth Information
Figure 9-10
Topology Diagram for Lab 9-3 (Answer)
172.16.0.0/23
PC2
Loopback1
209.165.200.225/30
Fa0/0
ISP
HQ
S0/0/1
DCE
S0/0/0
This router does not
physically exist.
192.168.1.16/30
192.168.1.20/30
S0/0/0
DCE
172.16.2.0/24
172.16.3.0/25
S0/0/1
S0/0/0
DCE
Fa0/0
Fa0/0
S0/0/1
B1
B2
192.168.1.24/30
PC1
PC3
Task 1: Subnet the Address Space
Examine the network requirements.
Step 1.
The addressing for the network has the following requirements:
The 172.16.0.0/16 network must be subnetted to provide addresses for the three
LANs.
■
The HQ LAN will require 500 addresses.
■
The BRANCH1 LAN will require 200 addresses.
■
The BRANCH2 LAN will require 100 addresses.
■
The loopback address representing the link between the HQ router and the ISP will
use the 209.165.200.224/30 network.
■
The 192.168.1.16/28 address space must be subnetted to obtain the addresses for the
links between the three routers.
■
Consider the following questions when creating your network design.
Step 2.
How many subnets need to be created from the 172.16.0.0/16 network?
3
How many total IP addresses are required from the 172.16.0.0/16 network?
800
What subnet mask will be used for the HQ LAN subnet?
255.255.254.0 or /23
What is the maximum number of host addresses that could be used on this subnet?
510
What subnet mask will be used for the BRANCH1 LAN subnet?
255.255.255.0 or /24
What is the maximum number of host addresses that could be used on this subnet?
254
What subnet mask will be used for the BRANCH2 LAN subnet?
255.255.255.128 or /25
What is the maximum number of host addresses that could be used on this subnet?
126
