Client/Server Protocol

Overview

The MySQL protocol is used between MySQL Clients and a MySQL Server. It is implemented by:

• Connectors (Connector/C, Connector/J, and so forth)
• MySQL Router
• Communication between source and replica replication servers
• MySQL Group Replication
• The Clone Plugin for cloning servers

The protocol supports these features:

• Transparent encryption using TLS
• Transparent compression
• A Connection Phase where capabilities and authentication data are exchanged
• A Command Phase which accepts commands from the client and executes them

Further reading:

• Protocol Basics
• Connection Lifecycle