Which of the following tools is used to detect wireless LANs using the 802.11 a/b/g/n WLAN standards on a linux platform?

Kismet is an open-source wireless network detector, packet sniffer, and IDS that natively runs on Linux and passively detects 802.11 a/b/g/n networks by sniffing beacon frames without transmitting probe requests, making it the correct cross-standard Linux wireless detection tool.

NetStumbler is a Windows-only wireless discovery tool that actively sends probe requests and does not support Linux or the full range of 802.11 standards listed.

Nessus is a network vulnerability scanner used to detect security weaknesses in systems and services, not a wireless LAN detection or packet sniffing tool.

Abel (from Cain and Abel) is a Windows-based password recovery and network analysis tool, not a wireless LAN detection tool and not designed for use on Linux.