Im going with B. Page 705 At the compute system level, security controls are deployed to secure hypervisors
and hypervisor management systems, virtual machines, guest operating systems,
and applications. Security at the network level commonly includes firewalls,
demilitarized zones, intrusion detection and prevention systems, virtual private
networks, and VLAN. At the storage level, security controls include data shredding,
and data encryption. Apart from these security controls, the storage infrastructure
also requires identity and access management, role-based access control, and
physical security arrangements.
B "Demilitarized Zone" is correct.
Page 718 of official textbook:
Definition of Demilitarized Zone: A control to secure internal assets while enabling Internet-based access to selected resources.
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