CompTIA A+ 220-1101 Practice Question

Port 22 (SSH) is the best answer, SSH is used for secure communications such as console connections to a remote server. Port 23 is for TELNET and is not a secure connection, it is unlikely (or a horrible practice) that TELNET would be used to connect to a sensitive database. Port 80 is for HTTP traffic, not for console connections. Port 3389 is for RDP, and would not usually be used for a console connection but a remote desktop connection.