单项选择题
A.multiple privilege levels
B.usernames and passwords
C.aaa new-model command
D.secret password for the root user
E.HTTP and/or HTTPS server
单项选择题 Please choose the correct description about Cisco Self-Defending Network characteristics.（）
单项选择题 WhichkeymethodisusedtodetectandpreventattacksbyuseofIDSand/orIPStechnologies？（）
单项选择题 Whichoneoftheaaaaccountingcommandscanbeusedtoenableloggingofboththestartandstoprecordsforuserterminalsessionsontherouter？（）