An IP packet contains two critical IP addresses in its header:
* Source IP address - the IP of the sending host
* Destination IP address - the IP of the receiving host
These addresses allow routers to forward the packet from source to destination over Layer 3 (Network Layer).
Other values in the IP header include TTL, protocol type, and checksum - but not additional IP addresses.
* A. 4 ##Incorrect. Only 2 IPs are included
* B. 2 ##Correct: Source and Destination
* C. 3 ##Some protocols like NAT may temporarily associate more addresses, but not in header
* D. 1 ##Incomplete
MTCNA Course Manual - IP Packet Structure:
"An IP packet always contains a source and destination IP address in the Layer 3 header. This allows routing to function across networks." Rene Meneses Guide - Packet Flow:
"IP headers are designed to carry the minimal information necessary for routing. That includes the source and destination IPs." Terry Combs Notes - Header Fields:
"Two IPs: one for sender, one for receiver. That's all you'll find in the IP header."