Because of the services we use on the Internet, it is generally operated from a central location, and this central location is called Data Center. Suppose to watch a video on YouTube, press the play button - that command went through our local ISP to the International ISP (ISP key) in Google's Data Center, from that request, the digital data of the video goes back to our device. When we came in, we were able to see the video - this is only in milliseconds.
