单项选择题
A. pre-sharedkey B. secure hash C. SSL D. RSA signature
WhatgroupinCiscoIOSdoes1536-bitDiffie-Hellmanprimemodul...
单项选择题What group in Cisco IOS does 1536-bit Diffie-Hellman prime modulus equivalent too？（）
A. group 3 B. group 1 C. group 5 D. group 7
Whataretheheadersizesforpoint-to-pointandmulti-pointGRE...
单项选择题What are the header sizes for point-to-point and multi-point GRE（also known asmGRE） with tunnel key？（）
A. 4 bytes for both B. 4 bytes， and 8 bytes respectively C. 8 bytes for both D. 24 bytes for both
Whichonesarethetwotypeofciphers？（）A. Blocking cipher an...
单项选择题Which ones are the two type of ciphers？（）
A. Blocking cipher andnon-blocking cipher B. CBC cipher and EBC cipher C. Block cipher and Stream cipher D. Blocker cipher and Streamer cipher E. 3DES cipher and AES cipher
