Which application would most likely use UDP instead of TCP?

Video streaming typically uses User Datagram Protocol (UDP) rather than Transmission Control Protocol (TCP) because of the nature of how video data is delivered and consumed. UDP is a connectionless protocol that allows for faster data transfer by sending packets without establishing a connection or ensuring that all packets reach their destination. This is particularly beneficial for streaming applications where real-time delivery is prioritized over reliability.

In video streaming, maintaining a steady stream of data is more critical than having each packet arrive intact. If a few packets are lost during transmission, it may result in minor glitches in video playback, but it does not significantly impact the viewer's experience. The quick transmission of data without the overhead of error checking and correction, which TCP provides, makes UDP more suitable for live broadcasts or on-demand video streaming where timeliness is essential.

In contrast, applications like email transmission, file transfer, and webpage loading require reliable data transmission with guaranteed delivery, order, and integrity, which TCP provides.