Wide Area Network (WAN) is a computer network that covers a broad areA. Which statement is correct for wide-area network (WAN)?()
A.
Connects client devices wireless protocol
B.
Crosses metropolitan, regional, or national boundaries
C.
Limited in a single building, a group of buildings, or even a single room
D.
Encompasses an entire city or metropolitan area and connects multiple local-area networks (LANs)