A system administrator runs a network inventory scan every Friday at 10:00 am to track the
progress of a large organization’s operating system upgrade of all laptops. The system
administrator discovers that some laptops are now only being reported as IP addresses. Which of
the following options is MOST likely the cause of this issue?

A.
HIDS

B.
Host-based firewalls rules

C.
All the laptops are currently turned off

D.
DNS outage

Explanation: