ARP requests and replies do not require authentication.

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Multiple Choice

ARP requests and replies do not require authentication.

Explanation:
ARP maps IP addresses to MAC addresses on a local network and has no built-in authentication. Requests are broadcast to ask who owns a given IP, and replies are sent with the corresponding MAC. There is no cryptographic verification or authentication field in standard ARP, so messages aren’t authenticated. This simplicity makes ARP fast and easy to use, but it also enables ARP spoofing/poisoning unless mitigations are in place (like static ARP entries or Dynamic ARP Inspection with DHCP snooping). So the statement that ARP requests and replies do not require authentication is true.

ARP maps IP addresses to MAC addresses on a local network and has no built-in authentication. Requests are broadcast to ask who owns a given IP, and replies are sent with the corresponding MAC. There is no cryptographic verification or authentication field in standard ARP, so messages aren’t authenticated. This simplicity makes ARP fast and easy to use, but it also enables ARP spoofing/poisoning unless mitigations are in place (like static ARP entries or Dynamic ARP Inspection with DHCP snooping). So the statement that ARP requests and replies do not require authentication is true.

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