Why Use VLANs

Traditional network designs use routers to create broadcast domains and limit broadcasts between multiple subnets. This prevents broadcast floods in larger networks from consuming resources, or causing unintentional denials of service unnecessarily. Unfortunately, the traditional network design methodology has some flaws in design

  • Geographic Focus – Traditional network designs focus on physical locations of equipment and personnel for addressing and LAN segment placement.Network segments for physically disjointed organizations cannot be part of the same address space.
  • Relocations of personnel and departments can become difficult, especially if the original location retains its network segments. Relocated equipment will have to be reconfigured based on the new network configuration.

A VLAN solution can improve both of these drawbacks.

  • Additional Bandwidth Usage – Traditional network designs require additional bandwidth because packets have to pass through multiple levels of network connectivity because the network is segmented.

A proper VLAN design can ensure that only devices that have that VLAN defined on it will receive and forward packets intended as source or destination of the network flow.

VLAN Described

VLAN Described

 

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