In our example, cities are acting like network routers.
在我们的示例中,城市就像网络路由器一样。
科技 Crash Course
Network routers are constantly trying to balance the load across whatever routes they know to ensure speedy and reliable delivery, which is called congestion control.
A router is a networking device that forwards data packets between computer networks. Routers perform the "traffic directing" functions on the Internet. A data packet is typically forwarded from one router to another through the networks that constitute the internetwork until it reaches its destination node.