Pete, a security engineer, is trying to inventory all servers in a rack. The engineer launches RDP sessions to
five different PCs and notices that the hardware properties are similar. Additionally, the MAC addresses
of all five servers appear on the same switch port. Which of the following is MOST likely the cause?

A.
The system is running 802.1x.

B.
The system is using NAC.

C.
The system is in active-standby mode.

D.
The system is virtualized.

Explanation:
Virtualization allows a single set of hardware to host multiple virtual machines.
Incorrect Answers:
A: The IEEE standard 802.1X defines port-based security for wireless network access control.
B: Network Access Control (NAC) is as a set of standards defined by the network for clients attempting to
access it.
C: This allows you to use a standby adaptive security appliance to take over the functionality of a failed
unit.

Dulaney, Emmett and Chuck Eastton, CompTIA Security+ Study Guide, 6th Edition, Sybex, Indianapolis,
2014, pp. 19, 95, 158