你的数据包就像一封写了地址但没有路线的信。它经过的每一个邮局——也就是路由器——都会读取地址，将其交给离目的地更近的邻居，然后将其遗忘。没有人掌握完整的地图：每个网络只是不断告诉它的邻居它可以到达哪些地址，消息就这样传递开来。✉️ #routing #internet
Your packet is a letter with an address and no route. Every post office it passes — that's a router — reads the address, hands it to whichever neighbour is closer, and forgets it. Nobody holds the whole map: each network just keeps telling its neighbours which addresses it can reach, and the word travels. ✉️ #routing #internet
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