What is the main improvement of HTTP/2 over HTTP/1.1?

Options

1. Headers are always sent in plain text format
2. Multiplexing many requests over one connection (Correct option)
3. It removed TLS support from modern browsers
4. It replaces TCP with a new transport protocol

Answer

Multiplexing many requests over one connection, removing head-of-line blocking at the HTTP layer

Why

HTTP/1.1 handles one request at a time per connection, so browsers opened about 6 connections per site and requests waited in line.

HTTP/2 sends many requests and responses at the same time over ONE connection (multiplexing) and compresses headers.

HTTP/3 runs over QUIC (on UDP), which also avoids TCP-level waiting when packets are lost.

Remember

HTTP/2 = many requests in parallel on one connection.

Key terms

• HTTP/2
• HTTP
• TCP
• QUIC
• UDP