Recently, no matter where I upload pictures or files, the network is abnormal; this gives me a headache; the network speed is still slow, especially when uploading to the cloud disk, it starts at 5 or 6kb, and then the upload fails, and the network is abnormal. Finally, I accidentally found a MTU on the router, a parameter; the maximum transmission unit MTU. The home connection is set to 1300 for the best effect, I hope it can help you, as shown in the figure: