These are typically FDDI, Fast Ethernet, or ATM connections. This architecture not only provides logical segmentation, it greatly enhances the efficiency of the network. Centralized administration control Reduced Administration Costs Companies continuously reorganize as they try to improve productivity. Each year 20 to 40 percent of the workforce is physically moved. These moves, adds, and changes are one of the greatest expenses in managing a network.
Many moves require recabling.
Almost all moves require new station addressing and hub and router reconfiguration. Invariably, as soon as managers stabilize their networks, more changes are requested. VLANs provide an effective mechanism to control these changes and reduce much of the cost of hub and router reconfiguration. VLAN users can share the same network address space regardless of location. If a group of VLAN users move but remain in the same VLAN connected to a switch port, their network address does not change.