VLAN (Virtual Local Area Network) Explanation

VLAN (Virtual Local Area Network) Explanation

1. What is a VLAN?

A VLAN (Virtual Local Area Network) is a logical segmentation of a physical network into multiple isolated networks. It helps improve performance, security, and network management.

1. Why Use VLANs?

Reduces Broadcast Traffic: Limits the number of devices receiving broadcast messages.

Enhances Security: Devices in different VLANs cannot communicate directly unless allowed.

Simplifies Management: Devices can be moved between VLANs without changing physical connections.

1. How VLANs Work?

VLANs are created on managed switches, and each port is assigned to a VLAN. Devices within the same VLAN can communicate, but communication between VLANs requires a router or a Layer 3 switch.

1. Types of VLANs:

Data VLAN: Used for regular user data.

Voice VLAN: Dedicated to VoIP phones to reduce latency.

Management VLAN: Used for network administration.

Native VLAN: Handles untagged traffic on trunk links.