本文旨在探讨局域网中如何发起基于ARP欺骗的中间人攻击及其防御方法。文中详细介绍了在局域网中如何借助特定工具发起中间人攻击的过程,揭示了局域网潜在的一类安全威胁,并通过在具有代表性的网络设备上部署和配置防御策略以应对此类安全威胁。 This article aims to investigate how to initiate a man-in-the-middle attack based on ARP spoofing and how to defend it in a local area network. This article details how to initiate man-in-the-middle attacks with specific tools in LAN, reveals a potential type of security threat in LAN, and responds to such security threats by deploying and configuring defense policies on representative network devices.