IBM DB2 Manual page 26

*Java byte code executed under JVM,
Figure 2. Java application flow for IBM Data Server Driver for JDBC and SQLJ type 2
connectivity
The following figure shows how a Java application connects to a data source using
IBM Data Server Driver for JDBC and SQLJ type 4 connectivity.
*Java byte code executed under JVM
Figure 3. Java application flow for IBM Data Server Driver for JDBC and SQLJ type 4
connectivity
10
Application Programming Guide and Reference for Java
Java application
DriverManager
or
DataSource
JDBC driver*
Local database
or DB2
subsystem
and native code
Java application
DriverManager
or
DataSource
JDBC driver*
DRDA
Database
server
Database
server
™