Question: In Transparent end-to-end Packet-switched Streaming Service (PSS), what is the primary purpose of a mobile terminal sending its device capability description (or profile) to the PSS server during the setup of a streaming session?
Option 1: To authenticate the user for billing purposes
Option 2: To provide the server with information to decide which stream(s) to provision, matching the terminal's capabilities with available content variants
Option 3: To initiate a voice call in parallel with the streaming session for customer support
Option 4: To request exclusive access to premium content not available to all subscribers
Explanation: The correct answer, Option 2, highlights the key functionality of device capability descriptions in PSS. By sharing its capabilities (e.g., screen resolution, audio channels), the mobile terminal enables the PSS server to select and provide the most suitable multimedia content from available variants, enhancing the user's streaming experience. This process is crucial for efficient content negotiation and delivery in telecom networks.