FUNDAMENTALS OF COMPUTER

Detailed explanation-1: -SSH (Secure Shell) is a secure network protocol used to remotely log into and execute commands on a computer. It’s commonly used to remotely access servers for management and maintenance purposes, but it can also be used for secure file transfers and tunneling network connections.

Detailed explanation-2: -An application layer service provide that standard internet services and network applications to the users. Remote login, Mail service and File transfer all are application layer services. Final Answer: Hence, the correct option is D i.e., All of the above.

Detailed explanation-3: -The RDP protocol opens a dedicated network channel for sending data back and forth between the connected machines (the remote desktop and the computer currently in use). It always uses network port 3389 for this purpose.

Detailed explanation-4: -HyperText Transfer Protocol (HTTP) HTTP is an application layer protocol used for transferring information between computers on the World Wide Web. HTTP is based on a request/response standard between a client; usually the host and a server, a web site.

Detailed explanation-5: -FTP. The FTP (File Transfer Protocol) is a standard internet protocol for transferring data from one computer to another. FTP uses TCP to transmit data because TCP provides reliability and error-free data transmission.