In the Cisco IOS command Switch(config)# Interface FastEthernet 0/1, what is the term used to describe the 0/1 portion?

In the Cisco IOS command Switch(config)# Interface FastEthernet 0/1, what is the term used to describe the 0/1 portion?

• A. interface name
• B. argument
• C. port number
• D. VLAN ID

Answer: (B)

The key idea is how the IOS command is structured: you specify the command, then the interface type, and then a specific selector for which interface to configure. In the command you’ve shown, FastEthernet is the interface type, and the 0/1 part tells the system exactly which FastEthernet port to configure. That piece is the argument—it's the parameter passed to the interface command to pick the specific interface. It’s not the interface name by itself, and it isn’t a VLAN ID. It simply identifies the particular hardware port to work with, as the argument to the interface command.

The key idea is how the IOS command is structured: you specify the command, then the interface type, and then a specific selector for which interface to configure. In the command you’ve shown, FastEthernet is the interface type, and the 0/1 part tells the system exactly which FastEthernet port to configure. That piece is the argument—it's the parameter passed to the interface command to pick the specific interface. It’s not the interface name by itself, and it isn’t a VLAN ID. It simply identifies the particular hardware port to work with, as the argument to the interface command.