Protocol Security Manager can protect various protocols including FTP, HTTP, and SMTP. FTP is a standard network protocol used for the transfer of computer files between a client and server, HTTP is the protocol used for transmitting hypertext requests and information on the internet, and SMTP is the protocol for email transmission across IP networks. These protocols are relevant and need protection, which is within the capabilities of Protocol Security Manager. SSH and Telnet are primarily used for remote access and command execution, which generally fall under different security tools specializing in encryption and secure access.