What is ARP and how does it work?

by | Jul 19, 2021 | CCNA, Exclusive Articles, Network Fundamentals

ARP Packet Format

What is ARP?

Address Resolution Protocol or ARP is a protocol using which a device can discover the data link layer address associated with a given network layer address. ARP is used by a device to discover a MAC address associated with a given IP address. ARP messages are communicated within the boundary of a single network. These messages are never routed by a router. So, this protocol works in the data link layer of the OSI model.

In this article, we will discuss:

  • What is ARP?

  • How does ARP work?

  • ARP Packet Structure

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Amrita Mitra

Author

Ms. Amrita Mitra is an author, who has authored the books “Cryptography And Public Key Infrastructure“, “Web Application Vulnerabilities And Prevention“, “A Guide To Cyber Security” and “Phishing: Detection, Analysis And Prevention“. She is also the founder of Asigosec Technologies, the company that owns The Security Buddy.

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