How to fully understand the speed of ADSL (1)

In just a few years, the number of Internet users in China has already exceeded million. When the number of Internet users exceeds, Internet applications are gradually enriched. Although most users are already using broadband technology to access the Internet, the maturity of fiber-optic access technology, and the reduction of the cost of fiber-optic access have gradually blurred the concept of "broadband, once Internet applications grow rapidly, broadband may become "narrowband ". Today, when people throughout the country enter the Internet age, what are the actual speeds of 512 K, 1 M, 2 M, and 8 M? What can we do with these bandwidths? How much bandwidth does a netizen need?

Bandwidth upgrade requirements for Internet applications

In the past, when the Internet was just logged on to China, there were few Internet applications, and the most bandwidth-consuming Internet applications were file downloads. However, the software size at that time was generally kb, and only a few pieces of software could be computed in megabytes. At that time, people used telephone dial-up Internet access. The theoretical speed was 56Kb/s, and the download speed was 8 KB per second. In addition to bandwidth loss, the actual download speed was 7KB/s. Currently, a software is dozens of megabytes, and a large one is hundreds of megabytes or even several GB. Dialing is no longer enough. As Internet applications are increasingly abundant today, the demand for bandwidth has also changed.

Currently, online games, online music, online movies, video chats, voice chats, Web browsing, P2P downloads, online chats, and IPTV applications. Among the above Internet applications, video chats, online movies, online music, And IPTV have the highest bandwidth requirements, especially IPTV. IPTV's demand for bandwidth is determined by the quality of the video. According to relevant experts, in the future, if IPTV activates HD video services, it will require at least 20 Mbps of bandwidth, while today's mainstream bandwidth is only 2 Mbps. It seems that there will be a big gap between Internet applications and mainstream bandwidth in the future. Obviously, Internet applications have increased the bandwidth requirements of Internet users.

Internet-based IPTV applications

Imagine how high the bandwidth requirements of Internet applications will be in the future. Taking a closer look, there are only about 10 types of Internet applications. According to the development speed of Internet applications, when domestic Internet users exceed 0.2 billion, Internet applications will be richer. With the penetration of the Internet, the digital age has entered our daily life. In the future, applications such as remote medical services and remote control digital appliances will become more popular. These applications have higher bandwidth requirements. The development of society also puts forward new requirements on bandwidth to a certain extent.

In the future, the Internet will become an indispensable tool for people's work and life. A variety of novel Internet applications will gradually enrich, and bandwidth requirements will also increase. It is precisely because of the diversity of Internet applications that the demand for bandwidth will gradually increase. In practical applications, what are the bandwidth requirements of each Internet application?