A router must use the Address Resolution Protocol 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

ARP is used by a router to resolve the MAC address of a host in its network. Whenever a router forwards an IP packet to a host that is not in its ARP cache, it must use the ARP process to obtain its MAC address. Therefore, option D is correct. Option A and option B are not correct because ARP is not used to detect the presence of a new or offline router. Option C is not correct because ARP is used for resolving MAC addresses, not for forwarding IP packets.

A Router Must Use the Address Resolution Protocol Process ________