Question: Which entity determines the set of access protocols (e.g., IP) to be supported at the fixed network interface for packet data networks in a PLMN?
Option 1: User Equipment (UE): The device used by the subscriber to access services.
Option 2: Mobile Network Operator's Technical Team: Responsible for network infrastructure management.
Option 3: International Telecommunication Union (ITU): Global telecommunications standards body.
Option 4: Public Land Mobile Network (PLMN) Operator: Entity managing and operating the mobile network.
Explanation: The PLMN operator has the authority and responsibility to decide on the technical and operational aspects of their network, including which access protocols to support at the fixed network interface. This decision impacts how subscribers can access packet data networks (e.g., via IP) and is a strategic choice for managing network resources and services offered to subscribers.