What is the role of ARP in a network?

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Multiple Choice

What is the role of ARP in a network?

Explanation:
ARP maps IP addresses to MAC addresses on the local network, so devices can actually deliver frames to each other. When a host knows the destination IP but not its MAC, it broadcasts a request asking, “Who has this IP? Please send me your MAC address.” The device with that IP responds with its MAC, and the requester caches this mapping in its ARP table for future use. With the MAC known, the Ethernet frame can be properly addressed and sent on the local link. ARP doesn’t route packets (routing is done by routers at the IP layer), it doesn’t cache DNS (DNS translates names to IPs), and it doesn’t encrypt data (encryption is a separate function).

ARP maps IP addresses to MAC addresses on the local network, so devices can actually deliver frames to each other. When a host knows the destination IP but not its MAC, it broadcasts a request asking, “Who has this IP? Please send me your MAC address.” The device with that IP responds with its MAC, and the requester caches this mapping in its ARP table for future use. With the MAC known, the Ethernet frame can be properly addressed and sent on the local link. ARP doesn’t route packets (routing is done by routers at the IP layer), it doesn’t cache DNS (DNS translates names to IPs), and it doesn’t encrypt data (encryption is a separate function).

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