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Firewall protection for a computer network
Explain how a firewall can be used to improve the security of a computer network.
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Marking points
- 1 Explains one valid firewall security role.
- 2 Explains a second valid firewall security role.
Full-mark answer
A firewall acts as a barrier between a network and external connections. It can inspect incoming and outgoing packets and block packets that match malicious or disallowed criteria.
Why this answer loses marks
It stops viruses from getting on the computer.
That is too vague for this network question; the answer needs packet inspection or rule-based filtering.