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List of common Internet protocols. 1  HTTP (Hypertext Transfer Protocol): allows you to share Web pages between a client and a server. 2  FTP (File Transfer Protocol) to transfer files to a server.  DNS (Domain Name System) allows to establish the link between a domain name and IP address (Internet Protocol).
The most common protocols are: 1  PPTP-PPTP has been around since the days of Windows 95. 2  L2TP/IPsec-L2TP over IPsec is more secure than PPTP and offers more features. 3  Open VPN-OpenVPN is an SSL-based VPN that continues to gain popularity.