(A speed limit function based on IP address, which can limit the speed of all PCs in a comprehensive Internet cafe, and can limit the upload and download speeds respectively. It can not only limit the speed of the internal comprehensive PCs together, but also set the speed of a specific internal PC separately. . How much is the speed limit suitable for? It is connected to the specific export bandwidth and Internet cafe solution, but the minimum bandwidth should not be less than 40K, and it can be set to 100-400K for comparison.)