When an IP packet is sent to a host on a remote network, what information is provided by ARP?
- the IP address of the destination host
- the IP address of the default gateway
- the MAC address of the router interface closest to the sending host
- the MAC address of the switch port that connects to the sending host
Explanation: When a host sends an IP packet to a destination on a different network, the Ethernet frame cannot be sent directly to the destination host because the host is not directly reachable in the same network. The Ethernet frame must be sent to another device known as the router or default gateway in order to forward the IP packet. ARP is used to discover the MAC address of the router (or default gateway) and use it as the destination MAC address in the frame header.
More Questions: CCNA 1 Module 9 Quiz – Address Resolution Answers