What type of firewall do you use to block access tocertain websites or instant messengers?
A.
Internet content filter
B.
NIDS
C.
circuit-level gateway
D.
NAT filtering
Explanation:
Section Reference: Defining Firewalls and Other Perimeter Security Devices
Another example of a proxy in action is Internet content filtering. An Internet content filter, or simply a content
filter, is usually applied as software at the Application layer and can filter out various types of Internet activities,
such as access to certain websites, email, instant messaging, and so on.
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