Abstract：In today's information age, LAN not only realizes the rapid sharing of information and data, but also strengthens the dissemination and sharing of information efficiency. However, due to the openness of the network, many viruses have a serious impact on the security of LAN information. Therefore, people realize the key of the application of computer network security technology,how to improve the security of network information, this is the focus of the topic. Based on this, this paper analyzes the effective application of network security technology in LAN environment, which is of great significance to improve the security and reliability of network technology in china.
