Network Security Involves Three Types of Defenses,which Are Referred to as Layers.Those

Multiple Choice

Network security involves three types of defenses,which are referred to as layers.Those layers consist of each of the following except:

A) perimeter security layer to control access to the network.
B) authentication layer to verify the identity of the person requesting access to the network.
C) biometrics layer to monitor network usage.
D) authorization layer to control what authenticated users can do once they are given access to the network.