January 2026
Beginner to intermediate
538 pages
6h 19m
Chinese
Content preview from Head First Networking (Chinese Edition)
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第6章 用路由器连接网络：整合资源
本作品已使用人工智能进行翻译。欢迎您提供反馈和意见：translation-feedback@oreilly.com
需要连接到遥远之地的网络吗？
迄今为止，我们已详细展示了如何搭建单一网络并使其正常运行。但若需要 需要与其他网络共享资源时？这正是路由器大显身手之处。路由器专精于无缝 传输网络流量 从 一个网络到另一个网络，本章将详细阐述其工作原理。我们将指导您如何 编程 路由器，以及如何利用路由器本身 解决任何故障。继续阅读，您将发现这简直超乎想象...
月球漫步式网络
月球基地是美国宇航局在月球上设立的指挥中心，他们需要与国际空间站（ISS）建立视频连接。但存在一个问题——月球基地缺乏网络支持通信。
你觉得能帮上忙吗？
启动你的月球网络，将下列设备连接成网络，使其能够通过无线电实现互联网通信。
启动你的月球网络，将以下设备连接成网络，使其能够通过无线电在互联网上进行通信。
我们需要连接两个网络
那么通常如何连接两个网络？首先需要一个正常运作的局域网（LAN）。其次需要连接到目标网络的通道，这可能是五类网线、光纤甚至无线电链路。最后需要路由器来连接两个网络——路由器通过物理方式连接网络 物理连接 和 逻辑。
物理网络指的是硬件设备，如电缆、交换机、集线器和路由器。
逻辑网络则涉及网络地址相关机制。
月球基地与国际空间站的网络现已通过路由器连接。那么一切是否正常运作？
灯亮着，但没人在家
月球基地交换机的LED指示灯正在闪烁，但遗憾的是，与国际空间站的视频连接仍未建立。
你认为闪烁的LED指示灯与网络流量有何关联？
回顾前章知识：以太网传输的数据以帧为单位进行传输。LED闪烁状态表明特定端口正在发送或接收以帧形式传输的网络流量。数据帧会根据帧内MAC地址确定传输目标。
因此，LED指示灯代表网络流量。
但这是否意味着网络正常运行？
如何验证？
请记住，以太网中的每个网络设备若要发送和接收网络流量，都必须拥有MAC地址。
脑力激荡
如何监控网络通信？需要使用哪些工具？
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.