Virtual LAN

The environment in which we work is changing everyday we met with changes. For changing locations and their offices will be a common and new thing for making projects.

We need lot of network administration for making shifts in the position of persons in the office. So the solution for this is the VLAN to sort out every problem that occurs with changing postions.

In the legacy systems , we use routers to limit the workgroups of the domains . We get benefits from it but it also include the problems like:

•  Lack of scalability

•  Lack of security

• Insufficient bandwidth use

•  Lack of flexibility

Virtual LAN, or VLAN, technology solves these problems because it enables switches and routers to configure logical topologies on top of the physical network infrastructure.

Logical topologies allow any arbitrary collection of LAN segments within a network to be combined into an autonomous user group, appearing as a single LAN.

Virtual LANs

A VLAN can be defined as a logical LAN segment that spans different physical LANs. VLANs provide traffic separation and logical network partitioning.

VLANs logically segment the physical LAN infrastructure into different subnets so that broadcast frames are switched only between ports within the same VLAN.

A VLAN is a logical grouping of network devices (users) connected to the port on a LAN switch. A VLAN creates a single broadcast domain and is treated like a subnet.