Question: In MBMS (Multimedia Broadcast/Multicast Service), when FEC (Forward Error Correction) protection is requested by the content provider, what specific components are protected by the MBMS FEC scheme as per the BM-SC's (Broadcast Multicast Service Centre's) configuration?
Option 1: UDP payload only
Option 2: TCP headers and IP packets exclusively
Option 3: Both UDP and TCP payloads, along with lower-layer headers
Option 4: Only lower-layer protocol headers (e.g., IP, Ethernet)
Explanation: According to the MBMS specifications for FEC protection initiated by a content provider's request, the BM-SC applies the MBMS FEC scheme specifically to cover the UDP payload. This targeted approach ensures error correction for the data being transmitted over UDP, which is crucial for reliable multicast and broadcast services, without unnecessarily protecting other protocol layers or types of traffic.