🌐
课程 4
How the internet works
📖 课程
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🎯 测验——选择翻译
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✅ 本课已完成
The internet is a postal service for computers: a page is cut into packets, flies through routers over cables and air, and is reassembled on your screen.
📡
路由器
🖥
服务器
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无线网络
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数据包
☁️
云
🌍
浏览器
🌊 99% of the internet travels through undersea cables on the ocean floor — not satellites!