What is a Firewall and How Does It Work?
What is the firewall? Firewall is a protective layer. Based on the pre-configured rules, it monitors and controls each packet passing through it. Broadly there are two types of firewall; hardware firewall and software firewall. Hardware firewall In this type of firewall, firewall is installed in a dedicated device. This device only runs the firewall. Since all resources of the device are available only for the firewall, it filters the traffic blazingly fast and accurate. It also offers several additional security features such as encryption and logging. Hardware firewalls are complex in configuration. Only experienced network administrators can configure these firewalls. Besides configuration, hardware firewalls also cost a lot of money as they use dedicated device. Fast speed and max accuracy are the advantages of the hardware firewall while high cost and complex configuration are the disadvantages of this firewall. Software firewall In this type of firewall, firewall is install...

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