VPN protocol

A VPN protocol is a set of communication rules and mechanisms that establish a VPN connection and protect and transfer communications. Authentication methods, encryption methods, and methods for establishing connections all vary depending on the protocol and its implementation.

Some of the most common VPN protocols include WireGuard, OpenVPN, and IKEv2/IPsec. Each has differences in terms of communication speed, supported environments, and flexibility in settings, and the appropriate method depends on the device and network environment used.

When choosing a VPN service, it is important to check not only the protocol used but also the actual security measures, communication quality, and the devices available.