Cisco Certified Network Professional Practice Test 2026 – Your All-in-One Guide to Exam Success!

The command used to verify the MAC and IP involved in an ARP request is "ip arp inspection validate." This command is part of the Dynamic ARP Inspection feature in Cisco networking, which is designed to prevent ARP spoofing attacks. When you enable this feature, the device performs checks on ARP packets to ensure their validity, specifically verifying that the MAC address corresponds correctly with the IP address in ARP messages.

Using "ip arp inspection validate" helps in ensuring that the ARP requests and responses conform to the parameters set in the ARP inspection configuration. It secures the network from man-in-the-middle attacks where an attacker may attempt to poison the ARP cache of a device in the local network. This command provides a necessary layer of integrity in the exchange of ARP information, which is vital for the correct operation of network communications.

The other options either reference commands that do not exist in this context or pertain to unrelated functions, making them inappropriate for this specific verification task.