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Port-based VLANs: VLAN membership is determined by the physical port on the switch where a device is connected.
Protocol-based VLANs: Device membership is based on the protocol being used, allowing for dynamic segmenting.
Voice VLANs: Designed specifically for managing voice over IP traffic to ensure quality of service.
Understanding these variants is essential when designing a network that meets your specific requirements.
Inter-VLAN Routing
While VLANs provide isolation, there are instances when communication between different VLANs is needed, which is where Inter-VLAN Routing comes into play. This routing is typically mediated by a layer 3 device (like a router), which uses packet headers to direct traffic while preserving VLAN segregation.