Which TCP port is specified for Telnet?

Which TCP port is specified for Telnet?

• A. 20
• B. 21
• C. 22
• D. 23

Answer: (D)

Telnet uses TCP port 23 to establish a connection between a client and a server. This protocol is designed for text-based communication over a network and allows users to remotely control network devices and servers. When you connect to a device using Telnet, the client initiates a session on port 23, enabling the transmission of commands and responses in a plaintext format. Understanding Telnet's function is essential as it's primarily used for remote management of network devices, despite the fact that more secure alternatives, like SSH (which operates on port 22), are recommended due to the lack of encryption in Telnet. This context helps illustrate the significance of port 23 in facilitating remote access and control when using Telnet specifically.

Telnet uses TCP port 23 to establish a connection between a client and a server. This protocol is designed for text-based communication over a network and allows users to remotely control network devices and servers. When you connect to a device using Telnet, the client initiates a session on port 23, enabling the transmission of commands and responses in a plaintext format.

Understanding Telnet's function is essential as it's primarily used for remote management of network devices, despite the fact that more secure alternatives, like SSH (which operates on port 22), are recommended due to the lack of encryption in Telnet. This context helps illustrate the significance of port 23 in facilitating remote access and control when using Telnet specifically.