Final answer:
An 'evil twin' in a wireless LAN is known as a Rogue AP, where a malicious Wi-Fi access point mimics a legitimate one to eavesdrop on wireless communications.
Step-by-step explanation:
The security threat known as an 'evil twin' in a wireless LAN (WLAN) is a) Rogue AP. An evil twin is a malicious Wi-Fi access point that appears legitimate but is set up to eavesdrop on wireless communications. This rogue access point is often placed in close proximity to a legitimate Wi-Fi access point and mimics its settings, SSID, and security protocols, tricking users into connecting to it instead of the valid network. Once connected, the attacker can potentially access sensitive information transferred over the network.
Bluesnarfing and bluejacking are different forms of attacks related to Bluetooth connections, while war driving involves searching for wireless networks from a moving vehicle to exploit unsecured WLANs.