I visited China this summer with my family. We took the high-speed train from Beijing to Shanghai, which went 300 kilometers/hour. A few years ago, I rode a magnetic levitation train in Shanghai with a top speed of 431 kilometers/hour (or 268 miles/hour). Both rides were a wonderful experience, and even though the speed was quite high, the rides were very comfortable. The speed of the trains made me think of the speed of an Ethernet network.