单项选择题

A.WhichstatementbestdescribesthebenefitsofCiscoIntegratedServicesRouters?()
A.ISRsprovidethreatdefenseagainstattacksfromhackersandvirusesthatcanoccurinthenetwork.
B.ISRsprovidetheframeworktointegrateandextendwiredandwirelessnetworks
C.ISRsprovideconcurrentsecurity,voice,data,wireless,andapplicationoptimizationservices.
D.ISRSprovidethecommonfabric,functionality,andCLIacrossthenetwork.