What protocol is used to transport digitized audio across the network?

• A. File Transfer Protocol (FTP)
• B. Real-time Transport Protocol (RTP)
• C. Hypertext Transfer Protocol (HTTP)
• D. Secure File Transfer Protocol (SFTP)

Answer: (B)

Real-time Transport Protocol (RTP) is specifically designed for delivering audio and video over networks in real-time, which makes it the ideal choice for transporting digitized audio. RTP provides features that are essential for streaming applications, such as the ability to synchronize various media streams, handle packet loss, and manage time-sensitive data during transmission.

In a typical audio transmission scenario, RTP encapsulates the digitized packets of audio and ensures minimal latency while maintaining the quality of service. This is crucial in applications such as VoIP (Voice over Internet Protocol) and multimedia streaming, where timely delivery is fundamental to user experience.

In contrast, protocols such as File Transfer Protocol (FTP) and Secure File Transfer Protocol (SFTP) are designed for transferring files rather than real-time audio communication, making them unsuitable for the needs of audio streaming. Hypertext Transfer Protocol (HTTP) is primarily used for web content and does not offer the real-time capabilities required for effective audio transport.