Firewalls and Security Group Concepts — Study Resources & PYQs

Curated resources, past papers and PYQs for Firewalls and Security Group Concepts.

Study resources

What Is a Firewall? (Article) — Cloudflare's clear explanation of firewalls and traffic filtering.
Firewalls Explained (Video) — A practical explanation of firewall rules and network segmentation.
AWS Skill Builder (Article) — AWS's own official, free digital training platform with hands-on labs and courses for this exact topic area.