单项选择题
A network administrator enters the command clear ip route * and as a result he sees the message，"Please update the network documentation to record why the ip routing table was cleared." Which router feature was used in this case？（）
A.NetFlow B.SNMP C.Debug D.SysLog E.EEM F.CEF
多项选择题 Whichofthefollowingroutermodelswillsupport1000tunnels？（）
单项选择题 Whichofthefollowingisnotatypicalmaintenancetaskwithinanetworkmaintenancemodel？（）
单项选择题 Whichofthefollowingcorrectlyfillsinthemissingwordsofthissentence：AnARPrequestusesaaddress，whereasanARPreplyusesaaddress.（）
