CCNA Cisco Certified Network Associate Study Guide - FTP Server

The IP Routing Process 245
2501B(config-if)#ip address 172.16.20.2 255.255.255.0
2501B(config-if)#clock rate 64000
2501B(config-if)#no shut
2501B(config-if)#int s1
2501B(config-if)#ip address 172.16.40.1 255.255.255.0
2501B(config-if)#clock rate 64000
2501B(config-if)#no shut
The above configuration configured the hostname and IP addresses as
well as the clock rate on the serial interfaces. The output of the following
show ip route command displays the directly connected networks of
172.16.20.0, 172.16.30.0, and 172.16.40.0.
2501B#sh ip route
Codes: C - connected, S - static, I - IGRP, R - RIP,
M – [output cut]
Gateway of last resort is not set
172.16.0.0/24 is subnetted, 3 subnets
C 172.16.40.0 is directly connected, Serial1
C 172.16.30.0 is directly connected, Ethernet0
C 172.16.20.0 is directly connected, Serial0
2501B#
Router A and Router B can communicate because they are on the same
WAN network. However, Router B cannot communicate with the 2621
router because it does not know about network 172.16.10.0. Router A can
ping both the 2621 router and 2501B, but 2501B and 2621 cannot see each
other.
2501C Configuration
The configuration of 2501C is the same as 2501A except that it has different
network IDs.
Router>en
Router#config t
Router(config)#hostname 2501C
2501C(config)#int e0
2501C(config-if)#ip address 172.16.50.1 255.255.255.0