Computer Science for IGCSE & O level - The Internet And Its Uses (Section 8 - No. 46)
Which statements are true about firewalls?
Firewalls are only available as hardware devices.
Firewalls allow a user to set rules for network traffic.
Firewalls will automatically stop all malicious traffic.
Firewalls encrypt all data that is transmitted around a network.
Explicació
Firewalls can be implemented in hardware or software, and users can configure rules to filter network traffic.