Which of the following is a characteristic of a network-based firewall?

Which of the following is a characteristic of a network-based firewall?
A . Inspects and filters traffic at the application layer
B . Operates at the data link layer
C . Provides protection against external threats only
D . Requires software installed on client devices

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Answer: C

Explanation:

Option 1: Incorrect. A network-based firewall inspects and filters traffic at the network layer, not the application layer.

Option 2: Incorrect. A network-based firewall operates at the network layer, not the data link layer.

Option 3: Correct. A network-based firewall provides protection against both external and internal threats.

Option 4: Incorrect. A network-based firewall does not require software installed on client devices.