|Exam 100-105||Question id=540||Routing Fundamentals|
When a router makes a routing decision for a packet that is received from one network and destined to another, which portion of the packet does it replace?
Layer 2 frame header and trailer|
Layer 3 IP address|
Layer 5 session|
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: