QUIC

Is a protocol mainly used for HTTP 3, in contrast to the previous version of HTTP uses TCP (Transmission Control Protocol) as a network protocol. QUIC based on UDP (User Diagram Protocol) for HTTP3.

It operates based on a stream of connections:

When using UDP (User Diagram Protocol) there might be some package lost. However QUIC has package loss detection and recovery, which will handle the package loss for us. draft-ietf-quic-recovery-32