HTTP/1.0 vs. HTTP/1.1 vs. HTTP/2 vs. HTTP/3
| Protocol | HTTP/1.0 | HTTP/1.1 | HTTP/2 | HTTP/3 |
|---|---|---|---|---|
| Keep-alive? 1 | No | Yes | Yes | Yes |
| Multiplex? 2 | No | No | Yes | Yes |
| QUIC? 3 | No | No | No | Yes |
1 One connection can be used for multiple requests/responses.
2 One connection can be used for parallel requests/responses.
3 Supports QUIC (based on UDP, faster than TCP/TLS on setup).