What is a virtual local area network

The Chinese name of VLAN (Virtual Local Area Network) is “Virtual Local Area Network”. VLAN is an emerging data exchange technology that logically divides LAN devices into network segments to realize virtual workgroups. This emerging technology is mainly used in switches and routers, but the mainstream application is still in switches. But not all switches have this function, only switches above the second layer of the VLAN protocol have this function.