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CompTIA Security+ All-in-One Exam Guide, Third Edition by Chuck Cothren, Roger Davis, Dwayne Williams, Gregory White, Wm. Arthur Conklin

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Security Topologies

Networks are different than single servers; networks exist as connections of multiple devices. A key characteristic of a network is its layout, or topology. A proper network topology takes security into consideration and assists in “building security” into the network. Security-related topologies include separating portions of the network by use and function, strategically designing in points to monitor for IDS systems, building in redundancy, and adding fault-tolerant aspects.

Security Zones

The first aspect of security is a layered defense. Just as a castle has a moat, an outside wall, an inside wall, and even a keep, so, too, does a modern secure network have different layers of protection. Different zones are designed ...

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