单项选择题
A.Configuration interceptor
B.Network interceptor
C.File system interceptor
D.Execution space interceptor
多项选择题 WhichthreeitemsareCiscobest-practicerecommendationsforsecuringanetwork？（）
单项选择题 Examinethefollowingitems，whichoneoffersavarietyofsecuritysolutions，includingfirewall，IPS，VPN，antispyware，antivirus，andantiphishingfeatures？（）
单项选择题 BeforeaDiffie-Hellmanexchangemaybegin，thetwopartiesinvolvedmustagreeonwhat？（）