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Address Resolution Protocol (ARP)

A network protocol used to map an IP address to a MAC address within a local network.

Understanding ARP


Every device on a network relies on ARP to find the physical address of other connected devices. However, ARP lacks authentication, making it susceptible to spoofing attacks.

Best Practices


  • Implement Dynamic ARP Inspection (DAI) to detect and block spoofed ARP packets.

  • Use static ARP entries for critical systems to prevent spoofing.

  • Deploy network segmentation to reduce attack surface.

Challenges and Considerations


  • Detecting ARP spoofing in large networks.

  • Performance impact of security measures on network traffic.

  • Need for continuous monitoring to prevent MITM attacks.

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