The broadband network we use has an access line connected to our home. Sometimes this line is a telephone line, sometimes a network line, and sometimes an optical fiber line. If we ask the service provider to upgrade the bandwidth, the Internet bandwidth will be adjusted without changing the network cable. Why?
The network access line we use, whether copper wire or optical fiber, is connected to the server of the service provider. The server transmits small packages of data. The web pages we browse are decomposed into small data packages, which are first transmitted to the server of the service provider and then to our computer. These servers are like local post offices. Packages sent from other places will be sent to the local post office first, and then sent to our home by the post office. In this way, small packages on the Internet are transferred to our home through one-stop transfer.
The ability of the server to transfer small packages of data is limited. If a user uses too much bandwidth resources, it will use up all the ability of the server to transmit small packages, so that other users will have no data to transmit. Therefore, the server will plan in advance how much bandwidth each user can use. When a new data packet arrives, the server will first check whether the data packet sent to the user is sent too fast. If it is too fast, it means that the user's bandwidth is full. At this time, the server will send the small package later, so that the user's data transmission speed will not exceed the bandwidth.
If you upgrade the bandwidth of the broadband network, the service provider will change the server settings to speed up the delivery of data packets sent to your computer, so that you can get higher transmission bandwidth. All this is done on the server side, so you don't need to pull a new cable to your home.
It should be noted that although the bandwidth can be set on the server side, the maximum bandwidth that different types of lines can bear is different. Some people live in remote places where the transportation is inconvenient. Of course, some people live in remote places where the transportation is slow.
The same network cable can have different bandwidth set by the service provider, but changing the maximum bandwidth is still limited by the type of access line. Therefore, sometimes upgrading bandwidth requires changing the line type. This is just like the post office sending parcels. To speed up the sending speed, sometimes it only needs to increase the number of postmen, and sometimes it has to ask for a more convenient means of transportation for postmen.