Router Operation

The configuration of IP addresses differs in some ways, with switches using a VLAN interface and routers using an IP address configured on each working interface.

switches do not have auxiliary ports.

Layer 2 switches support the show mac address-table command, while Cisco routers do not.

routers support the show ip route command, while Cisco Layer 2 switches do not.

Layer 2 switches use the show interfaces status command to list one line of output per interface (and routers do not)

show protocols command. This command confirms the state of each of the three R1 interfaces in Figure 15-6 and the IP address and mask configured on those same interfaces.