A router must use the ARP process ________.
A)when a new router comes online
B)when a router goes offline
C)whenever it forwards an IP packet
D)whenever it forwards an IP packet to a host that is not in its ARP cache

Question

Quizplus · Accepted Answer

A router must use the ARP process whenever it forwards an IP packet to a host that is not in its ARP cache. ARP (Address Resolution Protocol) is used by a router to map a MAC address to an IP address. If the router does not have the MAC address of the destination host in its ARP cache, it will use the ARP process to find the MAC address before forwarding the IP packet. ARP is not needed when a new router comes online or goes offline, as routers do not have MAC addresses. ARP is also not needed every time a router forwards an IP packet, only when the destination MAC address is not known.

A Router Must Use the ARP Process ________