- A. Layer 2 frame header and trailer
- B. Layer 3 IP address
- C. Layer 5 session
- D. Layer 4 protocol
What does a router do with a packet received from one network and destined for another network? The router performs the following three major steps:
De-encapsulates the Layer 3 packet by removing the Layer 2 frame header and trailer.
Examines the destination IP address of the IP packet to find the best path in the routing table.
If the router finds a path to the destination, it encapsulates the Layer 3 packet into a new Layer 2 frame and forwards the frame out the exit interface.