Which two statements are correct about MAC and IP addresses during data transmission if NAT is not involved? (Choose two.)
- Destination IP addresses in a packet header remain constant along the entire path to a target host.
- Destination MAC addresses will never change in a frame that goes across seven routers.
- Every time a frame is encapsulated with a new destination MAC address, a new destination IP address is needed.
- Destination and source MAC addresses have local significance and change every time a frame goes from one LAN to another.
- A packet that has crossed four routers has changed the destination IP address four times.
Explanation: IP addresses (Layer 3) represent the original source and final destination of a packet and remain constant throughout the entire path across multiple networks, provided NAT is not involved. In contrast, MAC addresses (Layer 2) have local significance only and are used to deliver a frame from one network interface to another within the same network. Every time a packet reaches a router, the Layer 2 frame is stripped off and a new frame with updated source and destination MAC addresses is created for the next segment of the journey.
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