Use VLAN & 3-layer Switch Technology To Improve LAN

In recent years the Group publishing business dependence on computer networks increasingly prominent, the network also the pressure is increasing. On the one hand, because the network of networks increase in the number of terminal equipment, network expansion, the sudden increase network traffic on the other hand, various business management applications continue to put into use, such as office automation systems, publishing business management information systems, network monitoring System, financial management system. These systems for the network bandwidth, security and reliability of a higher demand.In this paper, VLANs' technology and the development of the principle. CISCO 3-layer switch as an example on the principle. At the same time for the Group of LAN and VLANs' technology and multilayer switch technical characteristics, is a technology-based VLAN group of local area network design. Cisco 4009 Ethernet switches support VLAN, multicast filtering, 3-layer switch, broadcasting storm restrictions and other senior networking capabilities. In line with network security management system in the circumstances effectively prevent the broadcast of the storm, hacking, virus, to a certain extent reduce the network traffic, saving network bandwidth and reduce the network host load, raising the office's rapid information network Efficient and secure.