Which command can you enter to re-enable Cisco Discovery Protocol on a local router after it has been disabled?
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A. B. C. D.C
The correct command to re-enable Cisco Discovery Protocol (CDP) on a local router after it has been disabled is A. Router(config-if)#cdp run.
Here's an explanation of each answer choice:
A. Router(config-if)#cdp run - This command will enable CDP on the specified interface. If CDP has been globally enabled on the router, but disabled on the interface, this command will re-enable it.
B. Router(config-if)#cdp enable - This command does not exist. To enable CDP on an interface, you would use the "cdp run" command.
C. Router(config)#cdp run - This command will globally enable CDP on the router, but will not enable it on any specific interfaces. To enable CDP on an interface, you would use the "cdp run" command on the interface configuration.
D. Router(config)#cdp enable - This command does not exist. To globally enable CDP on a router, you would use the "cdp run" command.
In summary, the correct command to re-enable CDP on a local router after it has been disabled is A. Router(config-if)#cdp run.