Question

A network technician suspects that a particular network connection between two Cisco switches is having a duplex mismatch. Which command would the technician use to see the Layer 1 and Layer 2 details of a switch port?

1. show mac-address-table
2. show ip interface brief
3. show interfaces
4. show running-config

Answer 1

To investigate a duplex mismatch on a Cisco switch, the "show interfaces" command should be used. It presents detailed Layer 1 and Layer 2 information, including port status and speed settings, which is necessary to troubleshoot such issues.

Step-by-step explanation:

If a network technician suspects a duplex mismatch between two Cisco switches, the command to use in order to see the Layer 1 and Layer 2 details of a switch port is show interfaces. This command provides comprehensive information, including the duplex setting, speed, and status of the port, as well as other useful statistics. Commands like show mac-address-table display the MAC address table of the switch, show ip interface brief provides a quick summary of the interfaces on a device, including their IP address and status, and show running-config shows the active configuration file of the switch. However, for detailed physical and data link layer information, "show interfaces" is the most relevant command.