Problem Statement
What is the primary purpose of a firewall?
Explanation
A firewall acts as a security guard that monitors and controls incoming and outgoing network traffic. It sits between a trusted internal network and an untrusted external network such as the internet.
Firewalls use predefined security rules to allow or block data packets based on source, destination, and protocol. This helps prevent unauthorized access, data theft, or malware infiltration.
Modern firewalls also perform deep packet inspection and application-level filtering, giving organizations better visibility and control over network behavior.
