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Q143 (CISF/2023) Science & Technology › ICT, AI, Cybersecurity & Emerging Tech

Which one of the following protocols is used for determining the MAC address corresponding to an IP address?

Result
Your answer: —  ·  Correct: A

Explanation

The Address Resolution Protocol (ARP) is the standard protocol used to find the physical hardware address (MAC address) that corresponds to a known logical IP address. It operates between the Data Link Layer (Layer 2) and the Network Layer (Layer 3) of the OSI model. When a device wants to communicate with another on a local network, it broadcasts an ARP request; the device with the matching IP address replies with its MAC address.

  • IP (Internet Protocol): Responsible for addressing and routing packets across networks.
  • ICMP (Internet Control Message Protocol): Used for network diagnostic and error-reporting purposes (e.g., the 'ping' command).
  • FTP (File Transfer Protocol): An application layer protocol used for transferring files between a client and a server.
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