A router needs to forward a packet but its ARP cache is empty for the destination IP on a directly connected subnet. What does the router do next?
Answers
ASends an ICMP unreach
BBroadcasts an ARP request for the destination IP MAC address
CDrops the packet
DSends the packet to the default gateway
Correct answer: B — Broadcasts an ARP request for the destination IP MAC address
Before encapsulating a packet into a frame for a local subnet, a device must know the destination MAC address. It uses an ARP request to find it.
MIFOTRA exam practicealigned to Cisco CCNA 200-301·1 mark·Easy