Question: In a Multimedia Broadcast/Multicast Service (MBMS) scenario, how does a User Equipment (UE) typically discover the URI for a broadcast/multicast file repair session's Session Description (SDP file)?
Option 1: Through a dedicated point-to-point HTTP request specifically for repair sessions.
Option 2: Via an updated Associated Delivery Procedure Description transmitted in-band with the original download session.
Option 3: By parsing the Location field in an HTTP response with status code 200 (OK) from the file repair server.
Option 4: Through the Location field in an HTTP response with status code 302 (Found - Redirection) from the file repair server.
Explanation: The correct answer is Option 4 because, according to the specifications, when a file repair server decides to use broadcast/multicast repair, it informs the UE by sending an HTTP response with status code 302 (Found - Redirection). This response includes a Location field that contains the temporary URI of the Session Description (SDP file) for the broadcast/multicast repair session. This mechanism allows the UE to seamlessly transition from point-to-point communication to the multicast repair session, ensuring efficient use of network resources.