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

单项选择题Whatistheminimumrecommendedaccesspointoverlapforvoiceroaming？（）

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WhichclassofCiscoaccesspointsoperateunderIEEE802.3afpower？（）

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

单项选择题Toprovideefficientroamingbetweenthecells，whichpercentofcelloverlapisrecommendedfor2.4GHzand5GHzaccesspoints？（）

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

单项选择题UnderU.S.regulatorydomain，whichchannelplandeliversthepropercoverageinalargelecturehallthatrequiresfouraccesspoints？（）

A.1， 4， 7， 11
B.1， 4， 8. 11
C.1， 6， 11， 1
D.2， 4， 6， 8

单项选择题WhichCiscoaccesspointshouldbeusedforacustomersitethatrequestshardwaretosupportMaximalRatioCombiningindoors？（）

A.AP1130
B.AP1242
C.AP1252
D.BR1310