By default, which of the following uses TCP port 22? (Select THREE).
A. FTPS B. STELNET C. TLS D. SCP E. SSL F. HTTPS G. SSH H. SFTP
Answer: D,G,H
Explanation: G: Secure Shell (SSH) is a cryptographic network protocol for securing data communication. It establishes a secure channel over an insecure network in a client-server architecture, connecting an SSH client application with an SSH server. Common applications include remote command-line login, remote command execution, but any network service can be secured with SSH. SSH uses port 22.
D: SCP stands for Secure Copy. SCP is used to securely copy files over a network. SCP uses SSH to secure the connection and therefore uses port 22.
H: SFTP stands for stands for Secure File Transfer Protocol and is used for transferring files using FTP over a secure network connection. SFTP uses SSH to secure the connection and therefore uses port 22.