# PPT Slide

> RADIUS: Basics Authentication Data Flow

> ISP Accounting Database

> ISP Modem Pool

> The Internet

> ISP RADIUS Server

> Internet PPP connection established

> Acct-Status-Type=Stop User-Name=bob Acct-Session-Time=1432 ...

> Sun May 10 20:50:49 1998 Acct-Status-Type=Stop User-Name=bob Acct-Session-Time=1432 ...

> Acknowledgement

> The Accounting “Stop” Record

> User Disconnects

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