Disable ads (and more) with a premium pass for a one time $4.99 payment
The correct answer is that the default TCP port for Secure Shell (SSH) is 22. SSH is a protocol used for securely accessing and managing network devices and servers over an unsecured network. It provides strong authentication and secure encrypted data communications between two computers connecting over a potentially insecure network.
Port number 22 is widely recognized as the standard designation for SSH, which means that when an SSH server is installed and configured without any special adjustments, it will listen for incoming connections on this port. This is an important aspect of network configuration and security, as knowing the default port can help in firewall configurations and troubleshooting connectivity issues.
In contrast, port 21 is typically used for File Transfer Protocol (FTP), port 23 is designated for Telnet, which is an unencrypted protocol, and port 80 is the standard port for HTTP traffic. Understanding these port assignments is crucial for network security professionals to ensure that the appropriate services are secured and monitored correctly.