একটি বিল্ডিংয়ের কম্পিউটার সমূহের মধ্যে নেটওয়ার্ক স্থাপন করা হলে তাকে কি ধরনের নেটওয়ার্ক বলা হয় ?

Firewalls are filters network traffic which follows a set of rules and can either be used as hardware or software device. They are often categorized as network or host - based firewalls. Network firewall filter traffic between two or more networks while host networks run on host computers. Firewall is a network security system designed to prevent unauthorized access to or from private network. Network firewalls are used to prevent unauthorized internet users from accessing the private network especially intranets.