Question: What is the requirement for the IP Source Address of an IP packet carrying a piggybacked initial message along with a triggered response message?
Option 1: It should be different from the IP Address used for the triggered response message.
Option 2: It should be the same as the IP Address used for the triggered response message.
Option 3: It can be any valid IP address.
Option 4: It is not specified in the GTPv2-C protocol.
Explanation: According to the GTPv2-C protocol, when a piggybacked initial message is carried along with a triggered response message, they share a common IP header. The IP Source Address for this combined packet should be the same as the IP Address used for the triggered response message, ensuring consistency and proper routing of the messages in the network.