单项选择题 Ascustomersdeployconvergedservicesacrosstheirbusinessinfrastructures，accessrouters mustintegratesecurityservicesandIPcommunications.Whichrouterseriesisdesignedto achievethislevelofintegration？（）

单项选择题 Choosethemostaccuratestatementregardingtheaccountqualificationandplanningservice componentinthepreparephase.（）

单项选择题 Becauseofthesystems－levelapproach，Ciscosecuritycandefendagainstwidespreadattacks fromhackersandviruses.WhatdescribestheCisconetworksecuritystrategy？（）