KwickClips Computer Science · 42 sec · free
What does a firewall check?
Short answer. Every packet of data against its rules.
Can a firewall be software?
Yes, hardware, software, or both.
Remember
| Firewall checks every packet |
| Rules decide: allow or block |
Data knocks on your computer all day. Who decides? A firewall is the guard. A packet reaches the gate. Its rules are checked. Allowed packets enter. The rest are blocked. Remember. It checks every packet. Rules allow or block.
This clip is from the full lesson: Protecting Systems: Firewalls, Anti-virus, Encryption and Updates — 8 minutes, with the tables, the quick answers and the whole lesson in text.
Useful for: CBSE Class 11 Information Technology (802), Cambridge IGCSE Grade 9 Computer Science (0478), Cambridge IGCSE Grade 9 Computer Science (0478), Cambridge IGCSE Grade 10 Computer Science (0478)
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