Which of the following are TCP/IP protocols used at the Application layer of the OSI model? IP TCP Telnet FTP TFTP

1 and 3
1, 3 and 5
3, 4 and 5
All of the above

Correct Answer: 3, 4 and 5

Explanation:

Telnet, File Transfer Protocol (FTP), and Trivial FTP (TFTP) are all Application layer protocols. IP is a Network layer protocol. Transmission Control Protocol (TCP) is a Transport layer protocol.

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