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You are here: Home / CompTIA / Security+ / Chapter 1: Network Security / Security Function and Purpose of Network Devices and Technologies

Security Function and Purpose of Network Devices and Technologies

Firewalls

The Internet has become a necessary place for us to be. Unfortunately, the Internet harbors many potential threats to our computers, our data, and even our personal information. The first line of defense, and thus the first topic we will discuss in this guide, is firewalls.

Firewalls are the number one device most likely installed by network administrators to prevent malicious attacks. That’s because firewalls are network-based (or host-based) devices that operate by comparing (inspecting) incoming or outgoing network traffic, and . . .

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