Explain the meaning of the term "firewall" in relation to network security, as well as how it is used in a number of different network topologies, and why it is required.

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
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Explain the meaning of the term "firewall" in relation to network security, as well as how it is used in a number of different network topologies, and why it is required.

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Step 1

A firewall is a software or firmware that prevents unauthorised access to a company. 

It examines oncoming and moving traffic using several rules to identify and reduce risks.

Firewalls are used in home and office environments, and many devices, including Mac, Windows, and Linux PCs, come standard with one. 

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