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CompTIA® A+® Training Kit (Exam 220-801 and Exam 220-802) by Darril Gibson

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Chapter 22. Network Security Devices

The only way to keep a computer 100 percent safe from attacks is to never turn it on. When you start using it, especially when it is connected to a network, the risk of attacks rises significantly. Defense-in-depth refers to the practice of using multiple layers of security to protect systems and networks. Digital security methods play a large role in network security. This chapter covers several digital security methods used on networks, with a strong focus on firewalls.

Exam 220-801 objectives in this chapter:

  • 2.6 Install, configure, and deploy a SOHO wireless/wired router using appropriate settings.

    • Port forwarding, port triggering

    • Firewall

    • DMZ

    • Basic QoS

  • 2.9 Compare and contrast network devices and their functions ...

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