单项选择题
The Cisco Aironet 1140 Series Access Point draws 12.95 W at the power source. However， whenusing a long Ethernet cable， the device can draw up to how much additional wattage？（）
A.0.25 W B.0.45 W C.1 W D.1.25 W E.2.45 W F.5.65 W
单项选择题 Whenusingalightningarrestor，connectwhichtypeofgroundwiretoagoodearthground？（）
单项选择题 Byhowmuchisasignal’sstrengthreducedwhenthesignalpassesthroughanobjectthatintroduces3dBofattenuation？（）
单项选择题 Whatistheminimumrecommendedaccesspointoverlapforvoiceroaming？（）
