单项选择题
Which of the following IOS commands cause syslog messages to be stamped with time and dates？（）
A.service timestamps log datetime B.logging trap datetime C.service logging datetime D.logging datetime on E.logging timestamps on
单项选择题 Howwouldyoucharacterizethesourceandtypeinadenialofserviceattackonarouter？（）
多项选择题 WhichstatementsaboutMPLSLabelDistributionProtocol（LDP）arevalid？（）
多项选择题 Whichtwostatemetsaretrue？（）
