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You need to gather the IP address of a remote switch that is located in Hawaii. What can you do to find the address?

  • A.Issue the show ip arp command on the router connected to the switch.
  • B.Issue the show ip route command on the router connected to the switch.
  • C.Issue the show cdp neighbor command on the router connected to the switch.
  • D.Issue the show cdp neighbors detail command on the router connected to the switch.

Answer: D

Correct answer: Issue the show cdp neighbors detail command on the router connected to the switch.

CDP is the tool for discovering a directly connected Cisco device you cannot otherwise reach. The plain show cdp neighbors gives the device identifier, the local and remote ports, the platform and the capabilities - but not the address. Adding detail includes the neighbour’s IP address and IOS version, which is exactly what is wanted here. show cdp entry * gives the same information.

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