TFTP Protocol

D.

The correct answer is D. UDP.

TFTP (Trivial File Transfer Protocol) is a simple file transfer protocol that is used to transfer files between network devices. TFTP is a lightweight protocol that uses User Datagram Protocol (UDP) as its transport protocol. UDP is a connectionless protocol that operates at the Transport layer of the OSI model. Unlike TCP, UDP does not provide reliability or congestion control mechanisms, making it a faster but less reliable protocol for data transfer.

RSVP (Resource Reservation Protocol) is a protocol used to reserve resources in a network, such as bandwidth, for specific applications or services. It is typically used in Quality of Service (QoS) implementations.

TCP (Transmission Control Protocol) is a connection-oriented protocol that provides reliable, ordered delivery of data between applications. TCP is used by many applications, including HTTP (Hypertext Transfer Protocol), which is used to transfer data between web servers and clients.

HTTP is a protocol used for transferring data over the World Wide Web. It uses TCP as its transport protocol and typically operates over port 80 or 443. HTTP is used for web browsing, downloading files, and other web-related activities.

In summary, TFTP typically uses UDP as its transport protocol for file transfer.