Overview

Quick UDP Internet Connection (QUIC) protocol is an efficient and reliable Internet transport layer protocol proposed by Google based on UDP.

After the user enables such feature, CDN will follow QUIC protocol to process user's IP request, which can improve the processing speed and efficiency while ensuring reliability at the same time.

Precondition

To enable the QUIC protocol, you have to enable the HTTPS configuration first. For HTTPS configuration details, please see Configure Https.

Advantages of QUIC Protocol

• Delay of lower connection establishment

  When the client connects to the server for the first time, QUIC only needs 1 RTT (Round-Trip Time) to establish a reliable and secure connection, which is faster than 1-3RTT of TCP+TLS. Then the client can cache the encrypted authentication information locally, to achieve 0-RTT connection establishment delay when connecting to the server again.

• Revised jam control

  QUIC is featured with pluggable congestion control and more abundant signaling than TCP, which enables QUIC to provide richer information for congestion control algorithms compared with TCP. QUIC protocol uses Cubic congestion control algorithms of TCP protocol by default.

• Multiplexing to avoid queue blocking

  QUIC also multiplexes the multiplexing function of HTTP/2 protocol, but QUIC is based on UDP, so it avoids the queue head blocking problem of HTTP/2.

• Connection migration

  The connection migration refers to that, when any element changes, the connection remains, and keeps the business logic uninterrupted.

• Forward error correction

  A small number of lost packets can be recovered by forward error correction.

QUIC Protocol Configuration

1.Log in CDN Management Console, select Domain Name Management from the Navbar on the left of the console.

2.On the Domain Name Management page, select the domain name that needs to set HTTP header, and click Management in the action bar to the far right, as shown in the figure below.

3.On the Domain Name Details page, click Advanced Configuration, as shown in the figure below.

4.Set the switch of QUIC protocol toON at the QUIC Protocol Configuration of the Advanced Configuration tab.