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. This greatly simplifies the rewiring, configuration, and debugging required to get a user back on line. VLANs are a significant improvement over the techniques used in the wiring closet today. Controlling Broadcast Activity Broadcast traffic occurs in every network, whether controlled by effective network segmentation or by modifying an application's behavior.
Broadcasts can also occur as a result of faulty network interface cards and communication devices.
If incorrectly managed, they can seriously degrade network performance or even bring down an entire network. You can take measures to prevent broadcast-related problems. One of the most effective measures is to properly segment the network with protective firewalls. Firewalls minimize problems in one area so they cannot damage other parts of the network. Thus, while one segment may show excessive broadcast conditions resulting from a faulty network device or a mismanaged application, the rest of the network is protected with the firewall, commonly provided by a router.