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 if replace?

Question:
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 if replace?

• Layer 2 frame header and trailer
• Layer 3 IP address
• Layer 5 session
• Layer 4 protocol

Explanation: The Layer 2 information (source and destination MAC) would be changed when passing through each router. The Layer 3 information (source and destination IP addresses) remains unchanged.

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