Information Technology Reference
In-Depth Information
For the LANs in Region 1, assign subnet 0 to the LAN attached to FastEthernet 0/0 on
B1-R1. Continue to assign LANs in sequence. Subnet 1 is assigned to the LAN
attached to FastEthernet 0/1 on B1-R1, Subnet 2 to FastEthernet 1/0, Subnet 3 to
FastEthernet 1/1, and so on.
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For the WANs in Region 1, assign the last subnet to the link between R1 and B3-R1,
the second-to-last subnet to the link between R1 and B2-R1, and the third-to-last sub-
net to the link between R1 and B1-R1.
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Record the Region 1 subnet assignments in Table 5-10.
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Table 5-10
Subnets for Region 1
Router
Subnet Number
Subnet Address
B1-R1 Fa0/0
0
10.1.0.0
B1-R1 Fa0/1
1
10.1.4.0
B1-R1 Fa1/0
2
10.1.8.0
B1-R1 Fa1/1
3
10.1.12.0
B2-R1 Fa0/0
4
10.1.16.0
B2-R1 Fa0/1
5
10.1.20.0
B2-R1 Fa1/0
6
10.1.24.0
B2-R1 Fa1/1
7
10.1.28.0
B3-R1 Fa0/0
8
10.1.32.0
B3-R1 Fa0/1
9
10.1.36.0
B3-R1 Fa1/0
10
10.1.40.0
B3-R1 Fa1/1
11
10.1.44.0
B1-R1 <—> R1
3rd-to-last
10.1.244.0
B2-R1 <—> R1
2nd-to-last
10.1.248.0
B3-R1 <—> R1
Last
10.1.252.0
For the LANs in Region 2, follow the same format for assigning subnets that you used
for Region 1: Subnet 0 to the Fa0/0 interface on B1-R2, Subnet 1 to Fa0/1, and so on.
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For the WANs in Region 2, assign the last subnet to the link between R2 and B3-R2,
the second-to-last subnet to the link between R2 and B2-R2, and the third-to-last sub-
net to the link between R2 and B1-R2.
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Record the Region 2 subnet assignments in Table 5-11.
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Table 5-11
Subnets for Region 2
Router
Subnet Number
Subnet Address
B1-R2 Fa0/0
0
172.20.0.0
B1-R2 Fa0/1
1
172.20.2.0
continues
