How Alt-Svc Switches HTTP/2 Clients to Use HTTP/3

Explore the Alt-Svc header/frame capability in this 23-minute video tutorial. Learn how servers advertise alternative services to connected applications across protocols, ports, or domains. Discover the uses of Alt-Svc in HTTP/3, examine the header format, and understand its implementation with 103 early hints. Dive into the HTTP/2 Alt-Svc frame, explore the SVCB DNS record, and gain a comprehensive understanding of this powerful feature for switching HTTP/2 clients to HTTP/3.

Intro
what is alt-svc?
uses of h3 in alt-svc
alt-svc header
Alt-svc header with 103 early hints
h2 altsvc frame
SVCB DNS record
Summary