A Network Security Firewall is one of the most important tools in protecting personal and business data from cyber threats. Whether you're a home user or managing a corporate network, firewalls play a critical role in controlling incoming and outgoing network traffic.

A Network Security Firewall works like a barrier between your internal network and external threats such as hackers, viruses, and malware. It monitors data packets and decides whether to allow or block them based on pre-defined security rules.

There are two main types: hardware firewalls (physical devices) and software firewalls (installed on devices). Many advanced firewalls today also include features like intrusion detection, VPN support, and real-time traffic analysis.