单项选择题
What is used as label in cell-based MPLS ？（）
A.VPI B.VCI C.VPI and VCI D.Specific 4 bytes label E.None of above
单项选择题 WhichofthefollowingIOScommandscandetectwhethertheSQLslammerviruspropagatesinyournetworks？（）
单项选择题 Whatstatementistrue？（）
单项选择题 WhatCiscoIOSfeatureexaminespacketsreceivedtomakesurethatthesourceaddressandinterfaceareintheroutingtableandmatcktheinterfacethatthepacketwasreceivedon？（）
