Information Technology Reference
In-Depth Information
The HQ LAN will require 500 host IP addresses.
■
The links between each of the routers will require an IP address for each end of the link.
■
The IP addresses for the link from the HQ router to the ISP have already been assigned. The Serial
0/1/0 address of the HQ router is 209.165.200.226/27. The IP address of the Serial 0/0/0 interface of
the ISP router is 209.165.200.225/27.
Figure 3-4
Topology Diagram for Subnetting Scenario 2 (Answer)
172.16.20.0/23
PC1
ISP
S0/0/0
DCE
209.165.200.224/27
S0/1/0
S0/0/0
DCE
Fa0/0
S0/1/0
S0/0/0
DCE
HQ
S0/0/1
DCE
172.16.14.0/23
172.16.18.0/23
172.16.20.0/23
172.16.12.0/23
S0/0/0
S0/0/0
Fa0/0
Fa0/0
S0/0/1
DCE
WEST
S0/1/0
DCE
S0/0/1
DCE
EAST
S0/1/0
DCE
172.16.8.0/23
172.16.10.0/23
172.16.22.0/23
172.16.26.0/23
S0/0/0
S0/0/0
S0/0/0
S0/0/0
S0/0/1
DCE
S0/0/1
DCE
PC2
PC3
S0/0/1
S0/0/1
B1
B2
B3
B4
172.16.6.0/23
172.16.26.0/23
Fa0/0
Fa0/0
Fa0/0
Fa0/0
172.16.4.0/23
172.16.28.0/23
172.16.30.0/23
172.16.2.0/23
PC4
PC5
PC6
PC7
Table 3-7 provides a rough outline for the IP addresses, subnet masks, and default gateways (where
applicable) for the devices shown in the network topology shown in Figure 3-4.
Table 3-7
Addressing Table for Lab 3-2
Device
Interface
IP Address
Subnet Mask
Default Gateway
HQ
Fa0/0
172.16.16.1
255.255.254.0
—
S0/0/0
172.16.14.1
255.255.254.0
—
S0/0/1
172.16.18.1
255.255.254.0
—
S0/1/0
209.165.200.226
255.255.255.224
—
continues
