Which of these protocols would you find at the transport layer of the OSI model?2.0 MarksHTTPSUDPIMAPPOP3

The protocol you would find at the transport layer of the OSI model is UDP (User Datagram Protocol).

Here's a step-by-step explanation:

1. The OSI model (Open Systems Interconnection model) is a conceptual model that characterises and standardises the communication functions of a telecommunication or computing system without regard to its underlying internal structure and technology.

2. It has seven layers: Physical, Data Link, Network, Transport, Session, Presentation, and Application.

3. The Transport layer, which is the fourth layer, is responsible for end-to-end communication over a network. It provides the functional and procedural means of transferring variable-length data sequences from a source to a destination host via one or more networks, while maintaining the quality of service functions.

4. Protocols that operate at the Transport layer include: TCP (Transmission Control Protocol), UDP (User Datagram Protocol), DCCP (Datagram Congestion Control Protocol), SCTP (Stream Control Transmission Protocol), and IL (IL Protocol).

5. Among the options given - HTTPS, UDP, IMAP, POP3 - only UDP is a Transport layer protocol. HTTPS, IMAP, and POP3 are all Application layer protocols.