A VLAN (Virtual Local Area Network) is a group of devices on one or more LANs that are configured to communicate as if they were attached to the same wire, when in fact they are located on a number of different LAN segments.
A firewall is a network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules.
Network segmentation is dividing a network into smaller zones to improve performance, limit broadcast traffic, and contain security breaches.
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