单项选择题
What amount of cell overlap ensures smooth roaming for wireless endpoints?（）
A.5；10% B.10；15% C.15；20% D.20；25%
单项选择题 How many channels are defined in the IEEE 802.11b DSSS channel set?（）
单项选择题 Which signal and noise values will result in the best phone communication with an access point?（）
单项选择题 For acceptable voice calls, the packet error rate should be no higher than what value?（）
