随着互联网+教育的不断深入，公共机房对网络的依赖越来越强，通过网络监听获取他人隐私、入侵电脑窃取试卷等网络安全事件时有发生。本文对网络监听的概念、工具与方法进行分析，并根据监听原理和监听方法，提出网络监听的检测方法与防范措施。

With the deepening of the Internet + education, the public computer room relies more and more on the network. The network security events occur from time to time, such as obtaining other people's privacy through network monitoring, invading computers to steal examination papers, etc. In this paper, the concept, tools and methods of network monitoring are analyzed. According to the monitoring principle and monitoring method, the detection and prevention measures of network monitoring are put forward.