What is the primary function of the Address Resolution Protocol (ARP)?

Subject: Computer Networks

Topic: OSI Layer Model

Options:

1. Option A: Map an IP address to a physical MAC address
2. Option B: Map a domain name to an IP address
3. Option C: Dynamically allocate IP addresses to hosts
4. Option D: Route packets across subnets

Correct Answer:

Option A: Map an IP address to a physical MAC address

Explanation:

ARP resolves a known 32-bit IPv4 address into its corresponding 48-bit physical MAC address on a local area network.