A restaurant installs a second wireless router that only employees can use.

TheCCST Cybersecurity Study Guideexplains that disabling SSID broadcast hides the network from casual scanning, adding a layer of obscurity. While not a complete security measure, when combined with WPA2/WPA3 encryption and strong passwords, it can help protect private wireless networks, especially in environments with separate employee and guest access.

"Disabling SSID broadcast can reduce the visibility of a wireless network, making it less likely to be detected by casual attackers. This should be combined with strong encryption and authentication."

(CCST Cybersecurity,Basic Network Security Concepts, Wireless Security section, Cisco Networking Academy)

A(IP filtering) provides limited protection and is harder to manage for employee devices.

Bis correct: Disabling SSID broadcast adds an extra layer of obscurity for the employee network.

Cwould make the network easier to access from outside the premises, which is less secure.

Dwould cause network conflicts and make segmentation impossible.