Rough AP and Evil Twin

 Rough AP :- A rough access point is an AP placed in a network without official authorization. It might be an employee or it can be an attacker try to bypass the security. 

Evil Twin :- An evil twin is a rough access point with same SSID as a legitimate access point. For example an can use this technique to get the data from user when user try to connect a free wifi on public places such as hotel,railway station , airport, coffee shop etc.

Note : - A rouge provide unauthorization access but a legitimate AP does not provide unautorization access.