单项选择题
AcomputerisconnectedtothenetworkthroughaNIC，whichhasauniqueassignmentthatiscalledtheEthernetMACaddress.WhichlayeroftheOSImodeldoestheMACaddressusetocommunicatewiththenetwork？（）
单项选择题 WhichCiscoCatalystswitchesfitintheaccessarea？（）
单项选择题 WhichdeployedVoWLANclientsecurityoptionisrecommendedbyCisco?（）
单项选择题 Whichofthefollowingcommandsonthewirelessinterfaceofacisco3845integratedservicesrouterallowsthessidtobroadcast？（）
