单项选择题

How many channels are defined in the IEEE 802.11b DSSS channel set?（）

A.3
B.4
C.11
D.13
E.14

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热门试题

单项选择题

Which signal and noise values will result in the best phone communication with an access point?（）

A. signal strength 46dBm, noise level 95dBm
B. signal strength 74dBm, noise level 94dBm
C. signal strength 68dBm, noise level 79dBm
D. signal strength 50dBm, noise level 56dBm

单项选择题

For acceptable voice calls, the packet error rate should be no higher than what value?（）

A.0.1%
B.1%
C.2.5%
D.25%