COMPUTER NETWORKING

Detailed explanation-1: -Most Linux/Unix based machines such as OSX will automatically have a telnet client installed, which can be used by typing “telnet” within their native terminal window, followed by either the IP Address or Hostname of the remote Telnet Server, the port will automatically use 23.

Detailed explanation-2: -The default port for SSH client connections is 22; to change this default, enter a port number between 1024 and 32, 767. The default port for Telnet client connections is 23; to change this default, enter a port number between 1024 and 32, 767.

Detailed explanation-3: -Port 23: Telnet, used for accessing system remotely but is not very secure. Port 25: Simple Mail Transfer Protocol (SMTP) used by e-mail servers. Port 53: DNS protocol. Port 80: Used for accessing Web servers.

Detailed explanation-4: -Port 23 (Telnet) Port 23 is a TCP protocol that connects users to remote computers. For the most part, Telnet has been superseded by SSH, but it’s still used by some websites. Since it’s outdated and insecure, it’s vulnerable to many attacks, including credential brute-forcing, spoofing and credential sniffing.