单项选择题
CSA protects your host by： （）
A. Preventing browsers from opening network sockets inlistening state. B. Preventingbuffer overflows. C. Preventingusers from entering unencrypted passwords D. Preventing browsers from acting as client to webservers.
多项选择题 ChoosethemostcorrectstatementsaboutSMTP/ESMTP.（）
单项选择题 CiscoCleanAccessensuresthatcomputersconnectingtoyournetworkhavewhichofthefollowing？（）
单项选择题 Whichoftheseisthebestwaytoprovidesendernon-repudiation？（）
