Information Technology Reference
In-Depth Information
Router B1-R2 Interface
Subnet Number
Subnet Address
Fa0/0
0
172.20.0.0/25
Fa0/1
1
172.20.0.128/25
Fa1/0
2
172.20.1.0/25
Fa1/1
3
172.20.1.128/25
Router B2-R2 Interface
Subnet Number
Subnet Address
Fa0/0
0
172.20.2.0/26
Fa0/1
1
172.20.2.64/26
Fa1/0
2
172.20.2.128/26
Fa1/1
3
172.20.2.192/26
Router B3-R2 Interface
Subnet Number
Subnet Address
Fa0/0
0
172.20.3.0/27
Fa0/1
1
172.20.3.32/27
Fa1/0
2
172.20.3.64/27
Fa1/1
3
172.20.3.96/27
For the WANs in Region 2, subnet the address space 172.20.255.240/28. Record the
subnets in the table that follows.
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Router
Subnet Number
Subnet Address
B1-R2 <—> R2
0
172.20.4.0/30
B2-R2 <—> R2
1
172.20.4.4/30
B3-R2 <—> R2
2
172.20.4.8/30
Document the addressing scheme.
Step 2.
(Optional) On the topology in Figure 10-4, label each subnet. To save space, use only
the last two octets because only these octets change.
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Use the table provided in the printed instructions to document the IP addresses and
subnet masks. Assign the first IP address to the router interface.
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For the WAN links, assign the first IP address to R1 and R2 for links to each router's
respective B1, B2, and B3 routers.
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