Question: Which planes' functional entities support the Group Management Client in a SEAL architecture for Verticals (VAL) system, facilitating interactions with the Group Management Server and between UEs?
Option 1: Data User Plane & Media Control Plane
Option 2: Signalling Control Plane (specifically, Signalling User Agent and HTTP Client)
Option 3: Service Application Plane & Management Plane
Option 4: Transport Control Plane & Session Management Plane
Explanation: In the context of telecom networks, particularly within a SEAL architecture for VAL systems, the Group Management Client relies on specific functional entities for its operation. The correct answer highlights that this client is supported by entities within the Signalling Control Plane, namely the Signalling User Agent and HTTP Client. This is crucial because signalling control planes handle the management and setup of connections, which aligns with the group management functionalities (e.g., managing groups corresponding to vertical applications, interacting with servers and between UEs). The other options are incorrect as they either refer to planes not directly involved in such signalling and management tasks or mix concepts that don't specifically support the Group Management Client's described interactions.