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ISC2 Certified in Cybersecurity 2026 outline · Domain 4: Networking & cloud security concepts

Network design: segmentation, VLANs, DMZ, micro-segmentation, defense in depth

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Last reviewed September 25, 2026 · Leer en español

Tools like firewalls work best when the network itself is designed to contain problems. A flat network, where every device can talk to every other device, lets an attacker who compromises one laptop move freely to servers and databases. Good design divides the network so that each part can be protected according to its risk.

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