3.5. Identifying the Purpose, Benefits, and Characteristics of Firewalls

Generally speaking, a firewall is a hardware/software service that prevents packets from flowing through an interface from one network to another unless they meet the criteria specified by the firewall. In this section, we will discuss the main reasons that you might use a firewall and the benefits that you receive from using firewalls. In addition, we will discuss the characteristics of firewalls and some considerations of which you should be aware.

3.5.1. Critical Information

You should know the purpose of using a firewall. In addition, you should understand the main benefits that an organization obtains by using firewalls. Finally, you should understand the characteristics ...

Get Network+™ Fast Pass now with O’Reilly online learning.

O’Reilly members experience live online training, plus books, videos, and digital content from 200+ publishers.