单项选择题
A. -40dBm signal and -90dBm noise
B. -50dBm signal and -90dBm noise
C. -30dBm signal and -90dBm noise
D. -20dBm signal and -90dBm noise
单项选择题 Acompanyisusingamulti-sitecentralizedcallprocessingmodel.WhichfeatureensuresthattheremotesiteIPphoneswillstillhavelimitedfunctionalitygivenaWANoutage？（）
单项选择题 OneofyourcustomersisusingtheG.711codecwith802.11aaccesspointradios.This cansupportamaximumofhowmanyphonesperaccesspoint？（）
单项选择题 WhatisthetermforalogicalSANwhichprovidesisolationamongdevicesphysicallyconnectedtothesamefabric？（）