Which statement describes what happens when a packet enters a router?
Answer Options
The router accepts all incoming frames regardless of their destination MAC address.
The router decapsulates the packet and inspects the destination IP address.
Routers do not need to decapsulate packets to inspect the destination IP address.
Routers make routing decisions first by examining the source MAC address.
Correct Answer: B
Explanation
After the frame is verified to be addressed to the router and the FCS has been checked, the router decapsulates the packet and strips off the frame. The router will only accept frames that are unicast directly to the router's MAC address, multicasted to the router multicast group, or broadcast to all devices. Routers must decapsulate packets to inspect the destination IP address. Routing decisions are never made by examining the source MAC address, since the source of the traffic is irrelevant to the destination.