单项选择题

Which of the following would an attacker use to footprint a system？（）

A.RADIUS
B.Password cracker
C.Port scanner
D.Man-in-the-middle attack

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单项选择题

Which of the following technologies can be used as a means to isolate a host OS from some types of security threats？（）

A.Intrusion detection
B.Virtualization
C.Kiting
D.Cloning

单项选择题

Which of the following describes a static NAT？（）

A.A static NAT uses a one to many mapping.
B.A static NAT uses a many to one mapping.
C.A static NAT uses a many to many mapping.
D.A static NAT uses a one to one mapping.

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