Chapter 3
Defining a Firewall
Introduction
When most people think about Internet security, the first thing that comes to mind is a firewall, which is a necessity for connecting online. In its simplest form, a firewall is a chokepoint from one network (usually an internal network) to another (usually the Internet). However, firewalls are also being used to create chokepoints between other networks in an enterprise environment. There are several different types of firewalls.
Why Have Different Types of Firewalls?
Before we delve into what types of firewalls there ...
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