The ARP table of a router is used to map IP addresses to MAC addresses. Which command in Windows 7 displays this mapping?

• A. C:\arp -d
• B. C:\arp -s
• C. C:\arp -a
• D. C:\arp -b

Answer: (C)

The ARP cache is what your device uses to map IP addresses to MAC addresses on the local network, so you can see which hardware address corresponds to each IP. In Windows, the command that displays this mapping is the ARP command with the -a option. Running it shows the current ARP table for all interfaces.

The other options perform different tasks: -d deletes an entry from the ARP cache, -s adds a static entry, and -b isn’t used for displaying the ARP table in Windows. So the -a option is the one that reveals the mappings.