لینک دانلود و خرید پایین توضیحات دسته بندی : وورد نوع فایل : .doc ( قابل ویرایش و آماده پرینت ) تعداد صفحه : 10 صفحه قسمتی از متن .doc : - Background and Firewall Basics Before being able to understand a complete discussion of firewalls, it's important to understand the basic principles that make firewalls work. What is a network firewall? A firewall is a system or group of systems that enforces an access control policy between two or more networks. The ...