On the other hand, enterprise wireless network itself is very
vulnerable to be compromised, although enterprise APs usually
employ MAC screening to filter strange wireless devices. As
there are usually a number of mobile devices used in modern
enterprise environment including laptops, smartphones and
tablets, there is no guarantee that some of these devices will not
go missing or lost. These lost devices might have stored
authentication or encryption information which are used to
access to the enterprise WLAN, or at least their MAC
addresses are in the list of secure device. Attackers can steal
these enterprise devices, or just simply copy their
authentication information, to gain access to the enterprise
network