A new security administrator ran a vulnerability scanner for the first time and caused a system outage. Which of the following types of scans MOST likely caused the outage?
A. Non-intrusive credentialed scan
B. Non-intrusive non-credentialed scan
C. Intrusive credentialed scan
D. Intrusive non-credentialed scan
I answer C. Credentialed scan is more disruptive than non-credentialed, because with credentials the scan can gain deeper access to the system.