做好局域网的安全攻防工作，是营造健康可靠网络信息环境的关键所在。本文首先就局域网的几个特征进行 了阐述，然后从漏洞扫描、防火墙使用、安全设备搭建等多个方面，对局域网安全攻防测试进行了深入分析，有效提高了局域网 的安全指数，实现了为其顺利运行保驾护航的终极目标。

The attack and defense work of the local area network is the key to build a healthy and reliable network information environment. Firstly, the characteristics of LAN are described; then the security testing of attack and defense of LAN is analyzed from vulnerability scanning, firewall usage and security equipment construction. It improves the LAN security index, assuring its smooth operation.