Administration Guide > Pluggable Authentication Modules > What Happens at Deployment and Run Time
 
What Happens at Deployment and Run Time
At deployment, the embedded JAR files are automatically extracted to disk, and at run time the PAM’s packaged extension class loader will include the JAR files when resolving Java classes.
The optional lib folder in the primary deployment JAR file is a TDV-packaged extension framework mechanism that lets you bundle implementation-dependent run-time JAR file libraries—for example, custom or third-party JAR files—with the PAM.