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VLAN(Virtual Local Area Network)的中文名为“虚拟局域网”。VLAN是一种将局域网设备从逻辑上划分成一个个网段,从而实现虚拟工作组的新兴数据交换技术。这一新兴技术主要应用于交换机和路由器中。一个VLAN就是一个逻辑广播域,它可以覆盖多个网络设备。通过对VLAN的创建可以控制广播风暴的产生,从而提高交换式网络的整体性能和安全性。同一个VLAN中的端口可以接受VLAN中的广播包,别的VLAN中的端口则接收不到。
The Chinese name of VLAN (Virtual Local Area Network) is “Virtual LAN ”. VLAN is a LAN device will be logically divided into a network segment, in order to achieve the virtual workgroup of emerging data exchange technology. This emerging technology is mainly used in switches and routers. A VLAN is a logical broadcast domain, it can cover multiple network devices. Through the creation of VLAN can control the generation of broadcast storm, thereby enhancing the overall performance of switched networks and security. Ports in the same VLAN can accept broadcast packets in the VLAN, and ports in other VLANs can not receive them.