Which of the following desdription is WRONG .about Wi-Fi? ( ).
A.Any standard Wi~Fi device. will work anywhere in the world with global operative set of standaeds
B. Now most laptops are built with wireless network adapters inside
C.One can connect Wi-Fi devices in ad-hoc mode for client-to-client connections without a router
D.Communications between two devices need the involvement of an access point with Wi-Fi
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