Question: In a GPRS network, what is the primary basis for the Routeing Function to determine the core network node for forwarding a message and selecting the underlying service(s)?
Option 1: Source address of the message and QoS requirements
Option 2: Destination address of the message and available network capacity
Option 3: Type of service (e.g., voice, data) and priority level
Option 4: Destination address of the message
Explanation: The Routeing Function in a GPRS network relies on the destination address of the message to decide which core network node should receive the message and which service(s) will be used for transmission, ensuring efficient routing across diverse underlying networks. The destination address is crucial for determining the 'next hop' in the route.