VLAN Overview

This topic introduces what is VLAN and the advantages of VLAN.

What is VLAN?

VLAN allows you to segment out a physical network into virtual networks with different subnets. For example, one network is used by one department and another network is used by another department.


VLANs provide the following advantages:

  • Increase performance: VLANs enable logical grouping of users that are physically dispersed on a network. Additionally, VLANs create broadcast domains which eliminate the need for expensive routers, reduces traffic and decrease overall network latency.

  • Improve manageability: VLANs make large networks more manageable by allowing centralized configuration of devices located in assorted locations.

  • Enhance security: The separation of traffic on a network prevents unauthorized users from listening to or receiving sensitive data, and this will reduce risks and protect sensitive data.