Benefits of VLAN
VLAN function devices offer a performance of "value added" further the specific functions of virtual networks, although some are almost as fundamental as the very principles of the VLAN.
As in the case of the working groups "physical", the VLAN to allow a working group to share a logical broadcast domain. This means that systems within a given VLAN receive broadcast messages from the rest, whether or not they reside in the same physical network. Therefore, applications that require broadcast traffic continue to operate in this type of virtual networks. At the same time, the broadcast is not received by other stations in other VLANs.
The VLAN is not limited to a single switch, but can be extended through several, whether or not physically in the same location.
Besides the virtual networks may overlap, allowing several of them share certain resources, such as backbones (trunk) of high-performance servers and connections.
One of the biggest problems faced by network managers today is managing networks and subnets. The VLAN have the ability to use the same number of network segments, which is a practical mechanism to rapidly increase the bandwidth of new segments of the network without worrying about collisions directions.
Traditional solutions for Internetworking, using hubs and routers, require that each segment is a single subnet, on the contrary, with facilities in a VLAN, a subnet can be expanded across multiple physical segments, and a single physical segment can support several subnets.
We must also bear in mind that the most advanced switches with VLAN functions, are very sophisticated filters, defined by the user or network administrator, allowing us to determine very precisely the characteristics of traffic safety and we want in each domain, segment, or a whole network of networks. This is based on algorithms bridging and routing Multi.