January 2021
Beginner
565 pages
19h 27m
English
Content preview from Fundamentals of Communications and Networking, 3rd Edition
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Layered Network Security Architectures
Networks come in all different sizes and shapes, but they all have the same seven domains of a typical IT infrastructure, shown previously in FIGURE 14-5. When considering layered security, where does an organization put its dollars for security controls? If you have a firewall at your perimeter, is that enough security? What if you encrypt all of your sensitive data at rest and in transit? Do you care if the data is lost or stolen? Layered security is a systemic approach to designing and implementing security controls. Costs must be justified for security controls that solve an availability, integrity, or confidentiality challenge.
Think of layered security like an onion. The sensitive data is on the ...
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