Copper Ethernet Interface: This is the normal LAN interface, which takes
in an RJ-45 connector crimped to a copper cable. Based on speeds, these
interfaces are named Ethernet (10 MBps), FastEthernet (100 MBps), and
GigabitEthernet (1000 MBps). Modules having Ethernet interfaces
can be identified with a number followed by E, FE, CE, CFE, or CGE.
Modules with SW provide switching features when used on routers.