单项选择题

By how much is a signal’s strength reduced when the signal passes through an object thatintroduces 3 dB of attenuation？（）

A.1/6
B.1/4
C.1/3
D.1/2

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单项选择题

What is the minimum recommended access point overlap for voice roaming？（）

A.less than 10 percent
B.10 to 15 percent
C.15 to 20 percent
D.25 to 30 percent

单项选择题

Which class of Cisco access points operate under IEEE 802.3af power？（）

A.Class A
B.Class 1
C.Class 2
D.Class 3
E.Class 4

单项选择题

To provide efficient roaming between the cells， which percent of cell overlap is recommended for2.4 GHz and 5 GHz access points？（）

A.5 to 10 percent for both 2.4 GHz and 5 GHz
B.10 percent for both 2.4 GHz and 5 GHz
C.20 percent for 2.4 GHz and 15 to 20 percent for 5 GHz
D.20 percent for 2.5 GHz and 10 percent for 5 GHz