多项选择题
A. key mixing
B. AES-based encryption
C. anti-replay sequence counter
D. message integrity check
E. cyclic redundancy check
多项选择题 WheneverafailovertakesplaceontheASA（configuredforfailover），allactiveconnectionsaredroppedandclientsmustre-establishtheirconnectionsunless：（）
多项选择题 WhattwothingsmustyoudoontherouterbeforegeneratinganSSHkeywiththe"cryptokeygeneratersa"IOScommand？（）
单项选择题 Whatisthemainreasonforusingthe"ipipsdeny-actionips-interface"IOScommand？（）