VLAN is a custom network which is created from one or more existing LAN's. VLAN facilitates you to create a collision domain by groups other than just physical location while in conventional LAN domains are always tied to physical location.
Advantage of VLAN :
Broadcast control : A VLAN (Virtual Area Network) removes the physical layer and, it logically separates the networks within networks creating a smaller broadcast domain. It reduces the size of the broadcast domain, therefore, improving the efficiency of the network.
Simplified administration : When a computer is moved to another location, but it stays on the same VLAN without any hardware configuration.
Security : VLANs as required and ensuring network security according to their configuration.
LAN segmentation : Virtual Area Networks are used to logically separate layer 2 switch networks. Users on different VLAN cannot communicate with each other. Therefore, it's a great way of segmentation and provides security.
Dynamic VLANs : The Dynamic VLAN's are created using the software. The VLAN Management Policy Server (VMPS) is an administrator that dynamically allocates the switch ports based on the information available such as the MAC addresses of the device.
Protocol-based VLANs : The switch that depends on the protocol based VLANs, then the traffic will be segregated by a particular protocol.
