Question: In a telecom network, when is the 'Removal of QoS commit' procedure typically triggered for a session's media IP flow(s), according to 3GPP standards?
Option 1: When a new media IP flow is added to an existing PDP context.
Option 2: During a successful handover from one base station to another.
Option 3: When media IP flow(s) of a session are put on hold, such as during call hold or media re-negotiation.
Option 4: Immediately after the initial 'Authorize QoS Resources' request is sent to the GGSN.
Explanation: The correct answer reflects a scenario where the 'Removal of QoS commit' procedure is appropriately triggered. This is because putting media IP flows on hold (e.g., during call hold or media re-negotiation) necessitates adjusting the committed Quality of Service (QoS) resources, which aligns with the purpose of the 'Removal of QoS commit' procedure in managing QoS for sessions and their associated IP flows.