A network administrator is troubleshooting an issue with unstable wireless connections in a residence hall.
Students on the first and second floors are reporting the hall’s SSID is not visible in the evenings. The network administrator has verified the wireless system is operating normally.
Which of the following is the MOST likely cause for the problem reported by students?

A.
Internet router maintenance is scheduled.

B.
An ARP attack is underway.

C.
The SSID is set to hidden.

D.
A jammer is being used.