单项选择题
A. determine types of protocols to be supported
B. determine the environment in which the router will be used
C. select the number of WAN ports required
D. select the number of LAN ports required
单项选择题 CaptainMarion’sVideographydeliversInternetdigitalvideousing9MPEGvideoencodersandastatisticalmultiplexer.Channelsarepackedintoa6-MHzchannelbandwidth.TheMPEGmultiplexemonitorsandallocatestheappropriatebandwidth.Themultiplexermeasuresavailable bandwidthandfeedsbacksignalingtotheMPEGencoders.Codingratesarethenincreasedordecreased.Packetgenerationfromeachinputsourceiscontrolledsuchthatnopacketsaredroppedandnoextranullpacketscanbegenerated.Thesebandwidthandtrafficrequirementsworkbestwithwhichmodeofvideodelivery？（）
多项选择题 YouarethenetworkconsultantfromCisco.com.Pleasepointouttwostatementscorrectly describeanIPSdevice？（）
单项选择题 UsersattheCharlevilleCompanybeganexperiencinghighnetworkdelayswhenInternetconnectivitywasenabledforallusers.Afterinvestigatingthetrafficflow，youdeterminethatpeer-to-peertrafficfromamusicdownloadsiteisconsumingalargeamountofbandwidth.WhichQoSmechanismcanyouimplementtoimprovethenetworkresponsetime？（）