RTP is primarily used for which purpose?

• A. Chat messages
• B. Email transport
• C. Media encryption
• D. Real-time transport for VOIP

Answer: (D)

RTP is used to carry real-time media streams—like audio and video—across a network with timing information so playback stays synchronized. The protocol provides sequencing, timestamps, and payload type data that allow the receiver to reconstruct the media smoothly despite network variability. This focus on low-latency, real-time delivery is what makes RTP the standard choice for VOIP and other live multimedia applications. It isn’t designed for chat messages, email transport, or media encryption, which are handled by other protocols or layers.