第六章测试
1.There are two address fields in 802.11 frame.
A:对 B:错
答案:B
2.What are the type of wireless networks?
A:Multi-hop, infrastructure-less B:Multi-hop, infrastructure-based C:Single hop, infrastructure-less D:Single hop, infrastructure-based 3.Hosts in wireless networks can work in two modes ( )
A:ad hoc mode B:offline mode C:infrastructure mode D:online mode 4.APs transmit beacon frames. An AP’s beacon frames will be transmitted over one of the ( ) channels. The beacon frames permit nearby wireless stations to discover and identify the AP.
A:9 B:11 C:10 D:12 5.CDMA is a kind of ( ) protocol
A:none of the above B:taking-turns protocol C:channel division D:random access

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