what is firewall and how does it work
What Is a Firewall and How Does It Work? In today’s digital world, protecting computers, smartphones, networks, and other devices from online threats is extremely important. Every time a device connects to the internet, it can potentially communicate with other systems. Some of those connections may be unsafe or unwanted. A firewall helps protect devices and networks by monitoring and controlling network traffic. What Is a Firewall? A firewall is a security system that controls incoming and outgoing network traffic based on a set of security rules. It acts like a barrier between a trusted network or device and potentially unsafe networks, such as the public internet. The main purpose of a firewall is to prevent unauthorized connections while allowing legitimate traffic to pass through. For example, when you visit a website, your device sends and receives data through the internet. A firewall can examine that network traffic and determine whether it should be allowed or blocked ac...