Friends who know more about the network know that twisted pair cables have an "insurmountable" transmission distance of "100 meters". Whether it is a Category 3 twisted pair with a transmission rate of 10M, a Category 5 twisted pair with a transmission rate of 100M, or even a Category 6 twisted pair with a transmission rate of 1000M, the maximum effective transmission distance is 100 meters.

In the integrated wiring specification, the horizontal wiring must not exceed 90 meters, and the total link length must not exceed 100 meters. In other words, 100 meters is a limit for wired Ethernet, and this limit is the length of the link from the network card to the hub device.