Information Technology Reference
In-Depth Information
Device
Interface
IP Address
Subnet Mask
Default Gateway
HostA
NIC
172.16.0.2
255.255.254.0
172.16.0.1
HostB
NIC
172.16.2.2
255.255.255.0
172.16.2.1
HostC
NIC
172.16.3.2
255.255.255.128
172.16.3.1
List the address space that is still available for future expansion.
3.
For the solution shown in Figure 6-9, the address space still available is .3.140/30, .3.144/28,
.3.160/27, and .3.192/27.
Scenario 4
Complete Addressing Design Scenario 4 using the following list of requirements:
Address space: 172.24.0.0/21
■
RTA LAN, 1000 hosts; RTB LAN, 500 hosts; RTC LAN, 250 hosts
■
Using good VLSM design practices, contiguously assign subnets to the topology shown in
Figure 6-10.
1.
Figure 6-10
Addressing Design Scenario 4 Topology (Answer)
172.24.0.0/22
A
1000 Hosts
Address Space
172.24.0.0/21
Fa0/0
RTA
S0/1
DCE
S0/0
172.24.7.8/30
172.24.7.0/30
172.24.6.0/24
172.24.4.0/23
S0/0
DCE
C
S0/1
B
Fa0/0
Fa0/0
S0/1
RTC
RTB
172.24.7.4/30
S0/0
DCE
250 Hosts
500 Hosts
Fill in Table 6-6 with all necessary IP address configuration information for all devices. Use
dotted decimal format for the subnet mask.
2.
Table 6-6
Addressing Table for VLSM Scenario 4
Device
Interface
IP Address
Subnet Mask
Default Gateway
RTA
Fa0/0
172.24.0.1
255.255.252.0
—
S0/1
172.24.7.1
255.255.255.252
—
S0/0
172.24.7.9
255.255.255.252
—
continues
