A VPN is a lie you tell to the network—pretending to be somewhere you're not, connected to a network you're nowhere near. Here's how the illusion works.
VPNs solve two problems: connecting people to places, and connecting places to places. Understanding which problem you're solving determines which VPN type you need.
Every VPN protocol answers the same question differently: how do you build a private tunnel through public infrastructure? Here's what each choice actually costs you.
A flat network is a building with no interior walls. Segmentation adds doors, locks, and checkpoints—so breaking into one room doesn't mean owning the whole building.
A DMZ is a network's sacrificial zone—servers placed deliberately in harm's way so that when attackers breach them, your real assets survive behind the second wall.
Zero trust assumes your network is already compromised. Every access request—even from inside—must prove it deserves to exist.
A firewall blocks. An IDS watches. Understanding how intrusion detection systems monitor your network for threats that slip through—or start from within.
IPS sits in the path of every packet and makes a split-second decision: allow or block. Get it wrong one way, attacks get through. Get it wrong the other way, your business stops. This is the trade-off that shapes everything about how IPS works.
Security isn't about building impenetrable walls—it's about buying time. These practices make attacks expensive, slow, and visible enough that you can respond before real damage occurs.
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