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WireGuard is a modern, high-performance VPN protocol that is easy to install and configure on Ubuntu. It provides a secure and efficient way to create encrypted tunnels for networking. Installation involves adding the WireGuard repository (if necessary), installing the package using apt, and configuring the server and client settings. WireGuard is favored for its simplicity, speed, and strong cryptographic security, making it an excellent choice for VPN implementations on Ubuntu.