Cisco CCNA (200-301)Network AccessEasy
Which of the following commands is used to verify the VLAN membership of a specific port on a Cisco Catalyst switch?
- Ashow vlan brief
- Bshow interfaces <interface-id> switchport
- Cshow interfaces trunk
- Dshow running-config interface <interface-id>
Show answer & explanationAnswer & explanation
Correct answer: B. show interfaces <interface-id> switchport
The `show interfaces <interface-id> switchport` command provides detailed information about the switchport configuration, including its operational mode (access/trunk), access VLAN, and native VLAN.
Why the other options are wrong
- A. Shows a summary of all VLANs and their associated ports, but not detailed info for a single port.
- C. Shows only trunking interfaces and their allowed VLANs, not access port VLAN membership.
- D. Shows the configured commands but not the operational status or derived VLAN membership in all cases.
Cisco IOS Show Commands
IOS `show` commands are used to display the current state, configuration, and operational parameters of a Cisco device for verification and troubleshooting.
- `show running-config` displays the current active configuration.
- `show ip interface brief` provides a quick overview of interface status and IP addresses.
- `show vlan brief` lists all configured VLANs and their assigned ports.
Memory trick: Show me the switchport's secrets!