多项选择题
A. remote management
B. integrated telephony
C. do-it-yourself installation and management
D. experienced IT support required
E. single-site connectivity
单项选择题 Layer3（thenetworklayer）providesconnectivityandpathselectionbetweentwohostsystemsthatmaybelocatedongeographicallyseparatednetworks.Whichtwodevicesoperateatthenetworklayer？（）
单项选择题 WhatistheprimarypurposeofSMBSmartDesigns？（）
多项选择题 TheCiscoSA500SeriesSecurityAppliancesarebuiltspecificallyforbusinesseswithlessthan100employees.Whatarethreeimportantbenefitsofthisdevice？（）