Which of the following tools monitors the radio spectrum for the presence of unauthorized, rogue access points and the use of wireless attack tools?

IDS (Intrusion Detection System) monitors network traffic on wired segments for known attack signatures but does not scan the radio frequency spectrum for rogue wireless devices.

A firewall controls traffic flow between network segments based on rules but has no capability to detect or monitor wireless radio signals or rogue access points.

Snort is an open-source network IDS/IPS that analyzes packet data on wired networks and cannot monitor the RF spectrum for unauthorized wireless devices.

WIPS (Wireless Intrusion Prevention System) actively scans the radio spectrum to detect unauthorized or rogue access points, ad-hoc networks, and the use of wireless attack tools such as deauthentication injectors. Unlike general network monitoring tools, WIPS operates at the RF layer and can automatically contain threats by sending de-association frames or alerting administrators. This makes it the purpose-built solution for wireless-specific threat detection.