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简单介绍网络及路由器的基本概念,简述网络分层诊断技术,结合讨论路由器各种接口的诊断,综述互联网络连通性故障的排除。
Briefly introduce the basic concepts of network and router, briefly describe the technology of network hierarchical diagnosis, and discuss the diagnosis of various interfaces of routers, and summarize the troubleshooting of Internet connectivity failures.