UDP is classified as what type of protocol?

UDP, or User Datagram Protocol, is classified as a transport layer protocol. It operates at the transport layer of the OSI model, which is responsible for end-to-end communication and data transfer between hosts. UDP is primarily used for applications that require fast, efficient transmission of data, where the overhead of establishing a connection (as required by TCP) is not necessary.

As a transport layer protocol, UDP provides a means for applications to send messages without the complexities of connection setup and management, enabling low-latency communication. It allows data to be sent in discrete chunks called datagrams and does not guarantee delivery, order, or error correction, making it suitable for applications like video streaming, online gaming, and voice over IP, where speed is prioritized over reliability.

Other options refer to different layers of the OSI model: the application layer deals with end-user interactions and services, the network layer is focused on routing packets between networks, and the session layer manages sessions of communication between applications. Therefore, they do not apply to the characteristics and functions of UDP.