Glossary term
What is Alt-Svc (Alt-Svc header)?
Alt-Svc stands for Alt-Svc header.
A response header saying the site is also available over another protocol or port, such as HTTP/3.
Learn it properly · Networking for DevelopersLesson 4: HTTP/1.1, HTTP/2 and HTTP/3Requests and responses on the wire, keep-alive, head-of-line blocking, multiplexing, QUIC, and what changes for you as a developer.