An organization wants to detect rogue wireless access points connected to the corporate wired network. Which technique is most effective at identifying unauthorized wireless devices?

B is correct because wireless surveys detect all wireless signals in the environment, and correlating discovered BSSIDs against an authorized inventory identifies rogue devices that are not registered; physical surveys also locate rogue AP positions. A is wrong because rogue APs broadcast wirelessly and do not necessarily expose services detectable from the wired network. C is wrong because RF shielding is impractical for most environments and prevents legitimate wireless too. D is wrong because WEP is a deprecated weak encryption standard; requiring it would reduce security for all devices and would not identify rogues.