单项选择题
Wide Area Network (WAN) is a computer network that covers a broad areA. Which statement is correct for wide-area network (WAN)?（）
A.Limited in a single building, a group of buildings, or even a single room
B.Crosses metropolitan, regional, or national boundaries
C.Encompasses an entire city or metropolitan area and connects multiple local-area networks (LANs)
D.Connects client devices wireless protocol
相关考题
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单项选择题
Which WLAN device is often used to make wireless connections between buildings or campuses?（）
A.access point
B.client adapter
C.bridge
D.router -
单项选择题
Which software-based security threat is typically spread from user to user via e-mail?（）
A.Data interception
B.Virus
C.Trojan horse
D.Denial of service -
单项选择题
What does a router do?（）
A.Routes traffic down alternative paths and connects the local-area network (LAN) to the wide- area network (WAN)
B.Reads Media Access Control (MAC) addresses to forward messages to the correct location and connects the local-area network (LAN) to the wide-area network (WAN)
C.Stores data on the network and connects the local-area network (LAN) to the wide-area network (WAN)
D.Broadcasts data to all devices that are connected to it across the local-area network (LAN) and wide-area network (WAN)
