Question

Which statement is true about CDP on a Cisco device?

a.) The show cdp neighbor detail command will reveal the IP address of a neighbor only if there is Layer 3 connectivity.
b.) To disable CDP globally, the no cdp enable command in interface configuration mode must be used.
c.) CDP can be disabled globally or on a specific interface.
d.) Because it runs at the data link layer, the CDP protocol can only be implemented in switches.

Answer 1

CDP can be disabled globally or on a specific interface on Cisco devices using the 'no cdp run' global command or the 'no cdp enable' interface command.

Step-by-step explanation:

The correct statement about Cisco Discovery Protocol (CDP) on a Cisco device is: C) CDP can be disabled globally or on a specific interface. CDP is a Cisco proprietary protocol used to share information about directly connected Cisco equipment. To disable CDP globally, the command no cdp run would be used in the global configuration mode. To disable it on a specific interface, you would enter the interface configuration mode and use the command no cdp enable. It is not true that CDP only shows neighboring devices' IP addresses if there is Layer 3 connectivity, nor is it true that CDP can only be implemented in switches, as it can operate on other Cisco network devices as well.