While reviewing the wireless router, the systems administrator of a small business determines someone is spoofing the MAC address of an authorized device. Given the table below:
Which of the following should be the administrator’s NEXT step to detect if there is a rogue system without impacting availability?
A. Conduct a ping sweep.
B. Physically check each system.
C. Deny Internet access to the “UNKNOWN” hostname.
D. Apply MAC filtering.