Real-Time over HTTP/2 & HTTP/3: Multiplexing, QUIC & WebSocket Bootstrapping

12 questions

How HTTP/2 multiplexing, HTTP/3 over QUIC, and Extended CONNECT (RFC 8441/9220) reshape real-time delivery: application- vs transport-level head-of-line blocking, QUIC's independent streams and connection migration, and running a WebSocket as a multiplexed stream. The HOL-blocking contrast is verified with a Node simulation.