CompTIA Network+

Answer: A - When streaming media, such as music, it is most likely that a UDP (or User Datagram Protocol) is used.

Key Takeaway - There are two types of sessions when it comes to TCP/IP protocols: TCP (transmission control protocols), which are connection-oriented, and UDP, which are connectionless. Connection-oriented sessions require confirmation of packet delivery (like a delivery-receipt in snail-mail terms), whereas a connectionless session does not provide for confirmation. Since a dropped packet when listening to music is preferred to stopping every time a packet is lost, UDP is most likely employed. RDP (remote desktop protocol) allows remote access to a Windows PC, and QOS (Quality-of-Service) refers to maintaining a high-degree of quality in network (generally VoIP) systems.