https://digidefense.in/what-is-a-firewall-and-how-does-it-work-gradespot/
What is a Firewall and How Does It Work? - DigiDefense
Apr 10, 2026 - Learn what is a firewall, how it works, types, uses, and top vendors. Simple guide with real examples for beginners in cybersecurity.
what is a firewallhow does it work