Need help on verifying with Audit logs in SQL server

I have a requirement where I need to check from the Audit log if that is generated by sql scripts or through any Interface or Asp.net application.
There in the Audit tables I see two logs
1.Microsoft® Windows® Operating System
2..Net SqlClient Data Provider
So what does it mean. Is that logged by Asp.net application or through sql scripts. Please help me on this.