What action will a router take to forward a frame if it does not have an entry in the ARP table to resolve a destination MAC address?

Last Updated: Jan 9, 2023
IT Exam Items Repository › Category: CCNA 2 v7 › What action will a router take to forward a frame if it does not have an entry in the ARP table to resolve a destination MAC address?

What action will a router take to forward a frame if it does not have an entry in the ARP table to resolve a destination MAC address?

  • Sends a DNS request
  • Drops the frame
  • Sends an ARP request
  • Sends frame to the default gateway

Explanation: A router looks up the ARP table entry for the destination IP address to find the Layer 2 Media Access Control (MAC) address of the host. If no entry exists, the router sends an Address Resolution Protocol (ARP) request out of network interface, and the host responds with an ARP reply, which includes its MAC address.

Related exam: 16.3.4 Module Quiz - Troubleshoot Static and Default Routes

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