Which of the following is an example of a protocol used in the Transport Layer?

The Transmission Control Protocol (TCP) is indeed an example of a protocol used in the Transport Layer of the OSI model. The Transport Layer is responsible for providing end-to-end communication services for applications. TCP plays a crucial role in ensuring reliable transmission of data across networks. It manages breaking down large messages into smaller packets, sending them to the destination, and then reassembling them in the proper order. Additionally, TCP implements mechanisms for error-checking and flow control, which helps maintain the integrity and efficiency of the data communication process.

In contrast, the Internet Protocol (IP) operates at the Network Layer, handling the routing of packets across the network rather than the transmission of data segments. Hypertext Transfer Protocol (HTTP) and File Transfer Protocol (FTP) are application layer protocols; they are designed for specific types of data exchange between applications (web browsing and file transfer, respectively) and rely on underlying Transport Layer protocols like TCP to manage the actual transmission of data.