Can you explain what the HTTP/3 protocol means and how it differs from previous versions?

HTTP/3 is a new version of the HTTP protocol that uses the QUIC transport protocol instead of TCP, which is used in HTTP/1.1 and HTTP/2.

Main differences of HTTP/3:

• Use of QUIC: operates over UDP, which reduces delays during connection establishment and improves performance.
• Fast connection establishment: QUIC combines the TLS and transport handshake stages, speeding up data transfer initiation.
• Elimination of TCP-level blocking (Head-of-line blocking): in HTTP/2, if a packet is lost, the entire stream is blocked; in HTTP/3, streams are independent.
• Built-in security: QUIC inherently includes TLS 1.3 encryption.

Thus, HTTP/3 provides faster and more reliable data transfer, especially in unstable network conditions.