单项选择题
Which of the following encryption methods is often used along with L2TP？（）
A.S/MIME
B.SSH
C.3DES
D.IPSec
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单项选择题
Whichofthefollowingspecifiesasetofconsistentrequirementsforaworkstationorserver？（）
A.Vulnerability assessment
B.Imaging software
C.Patch management
D.Configuration baseline
