QUIC (Quick UDP Internet Connections) is a new encrypted-by-default internet transport protocol designed to accelerate HTTP traffic and improve security, with the goal of eventually replacing TCP and TLS on the web. Built-in security features include authentication and encryption from the transport protocol itself, making connections faster and more secure. QUIC also provides first class support for multiplexing different HTTP streams onto the same connection, reducing head-of-line blocking. Challenges in supporting this radical new protocol include addressing compatibility with existing network infrastructure and optimizing UDP performance on endpoints.