java - Difference between JDBC Driver type numbers

Question

I noticed that JDBC has different Drivers like:

1. Type 1 Driver
2. Type 2 Driver etc.. to Type 4

Why did they get the name like Type 1, Type 2 etc.? Is there any logic?

Answer 1

The type number tells something about how the driver actually communicates with the database.

1. Via ODBC API.
2. Via DB vendor specific API (using JNI calls on e.g. a DLL file in Windows).
3. Via generic network protocol (using sockets with e.g. TCP/IP protocol).
4. Via DB vendor specific network protocol (still with sockets).

In general (just by coincidence), how higher the type number, how better the JDBC driver performs.