Question: What does the value '1' of the MBMS-GW-UDP-Port-Indicator AVP indicate in relation to the delivery of user plane data for an MBMS service?
Option 1: The user plane data should be delivered on a randomly selected UDP port.
Option 2: The user plane data should be delivered on the UDP Port provided by the MBMS-GW.
Option 3: The user plane data is not required to be delivered on any specific UDP port.
Option 4: The user plane data should be delivered on a predefined UDP port known to both the MBMS-GW and the UE.
Explanation: According to the specification, when the value of the MBMS-GW-UDP-Port-Indicator AVP is '1', it indicates that the user plane data corresponding to the MBMS service shall be delivered on the UDP Port provided by the MBMS-GW.