Which port does SSH use for secure shell access?

SSH, or Secure Shell, utilizes TCP port 22 for secure shell access. This port is specifically designated for SSH protocol communications, which encrypts the data exchanged between clients and servers, providing a secure method for accessing remote machines. The use of TCP ensures reliable transmission of data, which is essential for maintaining a stable and secure connection during remote administration tasks, file transfers, and other operations.

Other ports mentioned in the options serve different protocols: port 445 is commonly associated with Microsoft-DS (Server Message Block protocol), port 3389 is used for Remote Desktop Protocol (RDP), and port 123 is used for the Network Time Protocol (NTP). Understanding the specific function and designation of these ports is crucial for network configuration and security management, especially in environments utilizing CyberArk solutions for privileged access management.