What is the default port used by Telnet?

What is the default port used by Telnet?

• A. 20
• B. 23
• C. 21
• D. 53

Answer: (B)

The default port used by Telnet is 23. This is significant because Telnet is a network protocol used to provide a command-line interface for communication with a remote device or server over a TCP/IP network. The choice of port number 23 is standardized for Telnet so that devices and applications can communicate without needing to specify a port, allowing for easier configuration and setup in networking environments. Understanding the context of the other options highlights their respective roles in networking: Port 20 is used for FTP data transfer, port 21 is the command port for FTP (File Transfer Protocol), and port 53 is assigned for DNS (Domain Name System) services. Each of these protocols serves a distinct function in network communications, making it important for a BMET to be aware of the standardized ports associated with each protocol, especially when troubleshooting or configuring networked medical equipment.

The default port used by Telnet is 23. This is significant because Telnet is a network protocol used to provide a command-line interface for communication with a remote device or server over a TCP/IP network. The choice of port number 23 is standardized for Telnet so that devices and applications can communicate without needing to specify a port, allowing for easier configuration and setup in networking environments.

Understanding the context of the other options highlights their respective roles in networking: Port 20 is used for FTP data transfer, port 21 is the command port for FTP (File Transfer Protocol), and port 53 is assigned for DNS (Domain Name System) services. Each of these protocols serves a distinct function in network communications, making it important for a BMET to be aware of the standardized ports associated with each protocol, especially when troubleshooting or configuring networked medical equipment.