單項選擇題Which network technology addresses these customer business needs: shrinking budgets and IT staffs, more complex networks, and an increased need for network security?()

A.Optical network
B.Network management
C.Storage-area network (SAN)
D.Content delivery network (CDN)


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1.單項選擇題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)

2.單項選擇題Which component should you use to reduce collision issues on a large LAN?()

A.Host
B.Switch
C.Printer
D.Repeater

3.單項選擇題In the 7-layer OSI model, which layer switching will take place?()

A.Layer one
B.Layer two
C.Layer three
D.Layer four

4.單項選擇題Which device is used in wireless networks to send transmissions to a target area?()

A.Optical fiber
B.Access point
C.Directional antenna
D.Omni-directional antenna

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