单项选择题
A.Cisco IOS router
B.Cisco PIX 500 series security appliance
C.Cisco 4200 series IPS appliance
D.Cisco ASA 5500 series security appliance
单项选择题 BeforeaDiffie-Hellmanexchangemaybegin，thetwopartiesinvolvedmustagreeonwhat？（）
单项选择题 Based on the username global configuration mode command displayed in the exhibit. What does the optionsecret 5 indicate about the enable secret password？（）
单项选择题 Whichkindoftablewillbeusedbymostfirewallstodaytokeeptrackoftheconnectionsthroughthefirewall？（）