File Transfer Protocol (FTP): Port number: 21, This protocol is used by a file-sharing application built on a client-server model, meaning you can download files from a central location., Secure Shell (SSH): Port number: 22, This protocol is used to securely login to systems via a text-based interface for management., HyperText Transfer Protocol (HTTP): Port number: 80, This protocol powers the World Wide Web (WWW)! Your browser uses this to download text, images and videos of web pages., HyperText Transfer Protocol Secure (HTTPS) : Port number: 443, This protocol does the exact same as above; however, securely using encryption., Server Message Block (SMB): Port number: 445, This protocol is similar to the File Transfer Protocol (FTP); however, as well as files, it allows you to share devices like printers., Remote Desktop Protocol (RDP): Port number: 3389, This protocol is a secure means of logging in to a system using a visual desktop interface (as opposed to the text-based limitations of the SSH protocol).,

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