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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?

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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