The difference between the two is that the persistent agent provides nonstop monitoring and automatic remediation and control. When running persistent OnGuard agents, ClearPass Policy Manager can centrally send system-wide notifications and alerts, and allow or deny network access. The persistent agent also supports auto and manual remediation.
Alternatively, the web-based dissolvable agent is ideal for personal, non IT-issued devices that connect via a captive portal and do not allow agents to be permanently installed. A one-time check at login ensures policy compliance. Devices not meeting compliance can be redirected to a captive portal for manual remediation. Once the browser page used during authentication is closed, the dissolvable agent is removed leaving no trace.