Question: What is the unique identifier of a Closed Access Group (CAG) within a Public Land Mobile Network (PLMN)?
Option 1: A variable length string
Option 2: A fixed length 32-bit value
Option 3: A combination of IMSI and MSISDN
Option 4: A dynamically assigned IP address
Explanation: The CAG-Identifier is a unique identifier for a Closed Access Group within a PLMN, and it is specified as a fixed length 32-bit value. This ensures that each CAG can be uniquely identified and distinguished from others within the network.