With the Internet entering thousands of households, an era of true Internet has arrived, but China's Internet speed has been restricting the development of the Internet. Many people's speed is simply the speed of the turtle. In China, the uplink of home users is far lower than the downlink bandwidth. Many 8M/20M broadband transmission speeds are even less than 50K/S. This in the end is why? First, a brief history of the development of home broadband network ADSL era, everyone is dial-up telephone line, uploading and downloading is not equal. The telephone line is divided into three relatively independent channels: telephone, uplink and downlink, thus avoiding mutual interference. In most cases, the ratio of downlink to uplink bandwidth can reach a ratio of 10:1. In the era of optical fiber, the optical fibers are responsible for uplink and downlink respectively, and there is no technical problem of ADSL uplink and downlink asymmetry. Taking PON technology as an example, downlink and uplink are frequency division multiplexing, which do not affect each other, and because of the principle of optical fiber transmission, even Your home is 20 kilometers away from the office, and the rate will not change much. From the ADSL era of dial-up Internet to optical fiber, the uplink and downlink rate equivalence of broadband networks has been solved technically. However, in fact, whether it is fiber users or broadband users, their uplink and downlink rates are still not equal. Second, why broadband uploading speed limit is well known, many fiber-optic households with 100 megabits of bandwidth, upload bandwidth is less than 4M. Too much more, a lot of 8M broadband, upload bandwidth is only 512K, the theoretical maximum upload rate of 64K /S, the actual 50K less than, the video will be open when chatting. Why broadband operators want to limit the upstream broadband of home users is actually to make huge profits. Since the ADSL era, users have become accustomed to the snail-like upload speed. Even now in the era of fiber optics, operators still follow the unspoken rules and do not give users too high upload speed. Broadband operators will gain more benefits by limiting the upstream bandwidth of home users and selling the saved resources to enterprise customers in the equipment room. The server hosted in the computer room requires a large amount of upstream bandwidth, and the cost of the 10M uplink of the equipment room is 5 or 6 times that of the home 100M. Therefore, the sale of downlink bandwidth to home users and the sale of upstream bandwidth to enterprise rooms in the equipment room have become a means for broadband operators to make profits. Third, limit the speed of the uplink, many of the initial problems, the broadband limit upload speed is afraid that users build websites at home, affecting their corporate line rental business. If the speed is equal, many companies will use the home fiber to build the website, instead of going to the computer room to host the host, resulting in the loss of the operator's interests. In the early Internet environment, the uplink and downlink asymmetry did meet the actual Internet access needs of users. Most people download most of the Internet and upload very little, so they do not need much upstream bandwidth. However, in the current Internet cloud era, applications such as video chat and cloud storage require a large amount of upload bandwidth. The diversification of network usage will inevitably lead to the simultaneous uplink and downlink demand. Therefore, the broadband operator limits the uplink bandwidth and has already affected. The overall network experience to the user. From the perspective of long-term development, broadband operators will not be conducive to the rapid development of Internet products if they do not let go of the restrictions on upstream bandwidth. No upload, what about Yun? This article comes from [system home] www.xp85.com Related articles recommended: 1. Mount multiple broadband to download speed 2. Why 100M broadband speed is so slow 3. How to calculate broadband download speed (4M example)