Information Technology Reference
In-Depth Information
Router B1-R1 Interface
Subnet Number
Subnet Address
Fa0/0
0
10.1.0.0/20
Fa0/1
1
10.1.16.0/20
Fa1/0
2
10.1.32.0/20
Fa1/1
3
10.1.48.0/20
Router B2-R1 Interface
Subnet Number
Subnet Address
Fa0/0
0
10.1.64.0/21
Fa0/1
1
10.1.72.0/21
Fa1/0
2
10.1.80.0/21
Fa1/1
3
10.1.88.0/21
Router B3-R1 Interface
Subnet Number
Subnet Address
Fa0/0
0
10.1.96.0/22
Fa0/1
1
10.1.100.0/22
Fa1/0
2
10.1.104.0/22
Fa1/1
3
10.1.108.0/22
For the WANs in Region 1, subnet the address space 10.1.128.0/28. Record the sub-
nets in the following table.
Router
Subnet Number
Subnet Address
B1-R1 <—> R1
0
10.1.128.0/30
B2-R1 <—> R1
1
10.1.128.4/30
B3-R1 <—> R1
2
10.1.128.8/30
The address space for Region 2 is 172.20.0.0/16. Each branch router (B1-R2, B2-R2,
and B3-R2) should be allotted address space based on the following requirements.
Starting with the largest requirement, assign address space to each router:
B1-R2 needs space for 1000 hosts 172.20.0.0/22
B2-R2 needs space for 500 hosts 172.20.4.0/23
B3-R2 needs space for 200 hosts 172.20.6.0/24
Divide the address space for each branch router into four equal subnets. Record the
subnets in the following tables.
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