Virtual LANs VLAN
A Virtual LAN (VLAN) is a network technology that enables network administrators to create logical groupings of network devices regardless of their physical location. VLANs are created to control broadcasts and organize network traffic.
In a traditional LAN, all devices connected to the network are on the same broadcast domain, which means that they all receive broadcast traffic sent by any device on the network. In contrast, VLANs allow network administrators to group devices into logical segments, effectively creating multiple virtual LANs within a single physical LAN.
Each VLAN has its own broadcast domain, which means that devices on one VLAN do not receive broadcast traffic sent by devices on other VLANs. VLANs also enable network administrators to control traffic flow between VLANs and to apply security policies and access controls at the VLAN level.
VLANs can be configured using software or hardware switches. In software-based VLANs, the VLAN configuration is stored in a switch’s memory and can be modified using network management software. In hardware-based VLANs, the VLAN configuration is stored in a dedicated chip on the switch and can be modified using command-line interfaces or web-based management interfaces.
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