HTTP/1.1
HTTP/1.1 is still the baseline. Load balancers, proxies, and debugging tools often present HTTP in this format. Understanding the wire format is essential.
What It Defines
Defines the HTTP/1.1 message framing: request/response syntax, chunked transfer encoding, persistent connections, and pipelining. Still widely used and foundational to understanding HTTP.
Canonical (Normative)
Convenient (Practical)
The canonical publication point for finalized RFCs. If a protocol is standardized as an RFC, the RFC Editor text is the normative final reference. Published by the IETF, IRTF, IAB, and independent stream.
Related Specs
This is the core contract of every web API, browser request, and server response. You can't design or debug HTTP without knowing this.
HTTP/3 is the current performance frontier for web delivery. CDNs enable it automatically; understand it for performance tuning and debugging.