Computer Science for IGCSE & O level - The Internet And Its Uses (Section 14 - No. 11)
What is the function of a 'firewall' in the context of cyber security?
To speed up internet browsing.
To protect a network from unauthorized access.
To store cookies.
To encrypt emails.
Explanation
A firewall acts as a barrier, monitoring and controlling network traffic to protect a system from malicious threats.
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