单项选择题
Cisco Clean Access ensures that computers connecting to your network have which of the following？（）
A. No vulnerable applications or operating systems B. No viruses or worms C. Appropriate security applications and patch levels D. Current IPS signatures E. Cisco Security Agent
单项选择题 Whichoftheseisthebestwaytoprovidesendernon-repudiation？（）
单项选择题 WhatgroupinCiscoIOSdoes1536-bitDiffie-Hellmanprimemodulusequivalenttoo？（）
单项选择题 Whataretheheadersizesforpoint-to-pointandmulti-pointGRE（alsoknownasmGRE）withtunnelkey？（）
