Which statement best describes ARP table security verification?

• A. That ARP table shows only authorized devices.
• B. Disable ARP table.
• C. Ignore unauthorized devices.
• D. Always trust all devices.

Answer: (A)

ARP translates IP addresses to MAC addresses on local networks, so keeping ARP mappings trustworthy means verifying that the ARP cache only contains entries for authorized devices. This helps prevent ARP spoofing, where an attacker sends fake ARP responses to mislead devices about who owns an IP address. In networks, this is often enforced with Dynamic ARP Inspection, static ARP entries for critical hosts, or DHCP snooping bindings, which ensure ARP updates reflect legitimate devices. So the statement that the ARP table shows only authorized devices best captures the idea of ARP table security verification. Disabling ARP would break address resolution; ignoring unauthorized devices or trusting all devices would leave the network vulnerable to spoofing and interception.