This tool is an 802.11 WEP and WPA-PSK keys cracking program that can recover keys once enough data
packets have been captured. It implements the standard FMS attack along with some optimizations like KoreK
attacks, as well as the PTW attack, thus making the attack much faster compared to other WEP cracking tools.
Which of the following tools is being described?

A.
Aircrack-ng

B.
Airguard

C.
WLAN-crack

D.
wificracker

Explanation:
Aircrack-ng is a complete suite of tools to assess WiFi network security.
The default cracking method of Aircrack-ng is PTW, but Aircrack-ng can also use the FMS/KoreK method,
which incorporates various statistical attacks to discover the WEP key and uses these in combination with brute
forcing.
http://www.aircrack-ng.org/doku.php?id=aircrack-ng