单选题What does a router do?（）AStores data on the network and connects the local-area network (LAN) to the wide-area network (WAN)BRoutes traffic down alternative paths and connects the local-area network (LAN) to the wide- area network (WAN)CBroadcasts data to all devices that are connected to it across the local-area network (LAN) and wide-area network (WAN)DReads 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)
单选题
What does a router do?（）
A
Stores data on the network and connects the local-area network (LAN) to the wide-area network (WAN)
B
Routes traffic down alternative paths and connects the local-area network (LAN) to the wide- area network (WAN)
C
Broadcasts data to all devices that are connected to it across the local-area network (LAN) and wide-area network (WAN)
D
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)
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What is A WAN?（）A、A network that is restricted.to A single building ,A group of buildings, or even A single room.B、A network that encompasses an entire city or metropolitanared and connects multiple LANs.C、A network that connects client devices wirelessly using radio waves.D、A network that crosses metropolitan, regional, or national boundaries.
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