This paper has briefly introduced the definition and characteristics of VLAN.The correct use of VLAN in the library network will improve the manageability,flexibility and security of the network.

• 简要介绍了VLAN的定义、特点,在图书馆网络中正确地使用VLAN技术,将会有效地提高网络的可管理性、灵活性、安全性。