CREST Practitioner Security Analyst (CPSA) 2026 – 400 Free Practice Questions to Pass the Exam

The standard port number for SSH, which stands for Secure Shell, is 22. This protocol is widely used for secure remote login and command execution over insecure networks. The use of port 22 allows SSH to establish a secure connection between the client and server, ensuring that all data transmitted during the session is encrypted and protected from eavesdropping, man-in-the-middle attacks, and other security threats.

While other ports mentioned may support different protocols, such as port 21 for FTP or port 23 for Telnet, they do not provide the same level of security that SSH does by default. Port 25 is typically used for SMTP (Simple Mail Transfer Protocol), which is used for email transmission. Recognizing that SSH utilizes port 22 helps in understanding network configurations and security measures in operating systems and applications.