R1(config)#ip route 195.0.20.0 255.255.255.0 195.0.0.10 10 For a stub network, or pocket network, like the network of R3 and PC2 in Figure 1 which is connected to the rest of the network through a single path it is possible to write a default route to direct all traffic of the exit interface S0/0/1 of R4 as in the following command: R3(config)#ip route 0.0.0.0 0.0.0.0 s0/0/1 Entering one default route, in this case, is briefer than entering the several static routes for all the networks that are remote to router R4. Network Topology Net-C, 195.0.0.0/30 Net-D, 195.0.0.4/30 S0/0/0, .1 S0/0/1, .2 S0/0/1, .6 S0/0/0, .5 R3 R1 GO/1, .9 GO/1, .10 Net-E, 195.0.0.8/30 R2 G0/0, .1 Fa0, 2 PC1 Net-A, 195.0.10.0/24 PC2 G0/0, .1 Fa0, .2 Net-B, 195.0.20.0/24 Figure 1 Network topology of the lab. Figure 1 shows the network topology of the lab. Every PC is connected to its default gateway router through a crossover UTP cable. Serial links are used to connect the serial ports of routers R1, R2, and R3. Also, the G0/1 interfaces of routers R1 and R2 are connected by a crossover UTP cable which is intended to be used as a floating backup link. The port assignments of the routers and host computers are shown. The network address, mask, and label of all subnetworks are shown. The IP address assignments of all interfaces are also shown in the figure.