What is a segmented network primarily composed of?

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A segmented network is primarily composed of two or more security zones, which helps to enhance security within the overall network infrastructure. By dividing the network into distinct segments or zones, organizations can better manage traffic, enforce policies, and isolate sensitive data or systems from less secure areas.

With multiple security zones, organizations can implement tailored security controls appropriate for the specific needs and risks associated with each segment. For example, a sensitive data zone can have stricter access controls and monitoring compared to a public-facing zone. This approach reduces the attack surface and helps to contain potential breaches within a limited scope, decreasing the overall risk to the network.

In contrast, having only one security zone would not provide necessary isolation between different types of data or user access levels, ultimately leading to greater vulnerabilities. Similarly, three or more security zones would provide additional segmentation, but the fundamental characteristic of a segmented network is the presence of at least two zones for effective security management. Single open security zones lack the necessary barriers to protect sensitive information, thus failing to fulfill the principles of network segmentation.

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