Which of the following statements about the Port Scanning feature of IPS is TRUE?

Which of the following statements about the Port Scanning feature of IPS is TRUE?

A.
The default scan detection is when more than 500 open inactive ports are open for a period of 120 seconds.

B.
The Port Scanning feature actively blocks the scanning, and sends an alert to SmartView Monitor.

C.
Port Scanning does not block scanning; it detects port scans with one of three levels of detection sensitivity.

D.
When a port scan is detected, only a log is issued, never an alert.