Which WLAN device is often used to make wireless connections between buildings or campuses?（）

A.it isA point product solution that addresses a single need
B.it provides customers with an opportunity to increase the number of devices in their network
C.it simplifies purchasing because there is only one model to choose.
D.it integrates multiple services intoA single platform and reduces operating costs.

A.to provide users withA single device that permits access to information anywhere
B.to provide users with the same productivity and access to information no matter where are or which device they use
C.to eliminate the need for border security and firewalls
D.to provide companies withA way to extend their security and control over employees on the internet

A.spanned
B.bridged
C.converted
D.gated
E.integrated