随着科技的不断发展,现如今局域网已经得到了十分广泛的应用,其主要是作为小范围的网络,但是其具有多方面的实际功能,包括实现信息资源的共享、交换信息资源等。然而,安全问题始终是制约局域网进一步推广的关键因素,鉴于此,文章首先分析了现阶段局域网面临的主要威胁,在此基础上,进一步分析了局域网的安全攻防问题。 With the continuous development of science and technology, the LAN has been widely used nowadays. It is mainly used as a small-scale network. However, it has many practical functions, including the sharing of information resources and the exchange of information resources. However, the security issue is always the key factor restricting the further promotion of the local area network. In view of this, the article first analyzes the main threats that the local area network faces at present, and then analyzes the security attack and defense of the local area network further.