An administrator wants to proactively collect information on attackers and their attempted methods of gaining access to the internal network. Which of the following would allow the administrator to do this？（）

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

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

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.