What are the similarities and differences between "Thunder" downloads and BT downloads?

BT's official name is "Bit-Torrent" (nicknamed "abnormal download" by domestic netizens). It is a multi-point sharing protocol software developed by a man named Bram Cohen from California, USA. Developed by programmers.

BitTorrent is specially designed for the sharing of large-capacity files. It uses a working method that is a bit like a pyramid scheme.

BT first divides a file into many parts on the uploader side. User A randomly downloads some parts, while user B randomly downloads other parts.

In this way, A's BT will automatically select the fastest end according to the situation (according to the network connection speed with different computers) to B's computer to get the part that B has downloaded. Similarly, B's BT According to the situation, it will go to A's computer to get the downloaded part of A. This not only reduces the load on the server, but also speeds up the download speed of both parties.

In fact, while each user is downloading, he is also uploading as a source (someone else takes a certain part of the file from your computer). This situation effectively utilizes the upstream bandwidth and avoids the traditional FTP bottleneck of everyone crowding into the server to download the same file. The more people who join in downloading, the more people actually upload, and the faster other users can download. This is where the advantages of BT are reflected.

Unlike usual FTP and HTTP downloads, BT downloads do not require specifying a server. Although there is still the concept of a server in BT, the downloader does not need to care about where the server is. Only the person who posted the original shared file needs to know.

The server that provides BT is called a Tracker. People who publish files using BT need to know which server to use to provide a Tracker for the files to be published. Since the server is not specified, BitTorrent uses BT files to determine the download source. The BT file suffix is ??torrent, and its capacity is very small, usually tens of K. This file stores the description information of the corresponding release file, which Tracker should be used (the server that records downloaded user information), and the verification information of the file. wait. The BT client finds the download source and performs related download operations by processing BT files.

BT calls the person who provides the complete file file a SEED, and the person who is downloading the file is called a Client. A file can be seen by as many clients as there are currently, as long as there is one seed. , you can download it with confidence and you will definitely catch it. Of course, files with more seeds and more customers will be captured faster.

If you find that the seed number is 0, then don't try it. Generally speaking, there is at least one torrent. When more people download, the number of torrenters usually also increases, and the download speed becomes faster. When your download is complete, if you do not choose to close it, others can continue downloading from you.

The latest version of BitTorrent is 3.3, with various cross-platform versions.

Xunlei is a new download software based on P2SP technology. Xunlei 4 continues the advantage of fast download speed of the previous version. At the same time, the previous version's weaknesses such as unstable downloading of single-server resources and poor download management functions have been completely improved in this version.

As a "download tool in the broadband era", Thunder 4 has been specially optimized for broadband users. It can make full use of the characteristics of broadband Internet access and bring users a new experience of high-speed downloading! Xunlei 4 not only inherits the fast download characteristics of previous versions, but also further achieves "fast and stable" downloads by optimizing the software's own architecture. It also achieves "fast and complete" downloads by optimizing and integrating download resources. It also improves user files. In terms of management, it provides relatively complete support, especially the configuration, proxy server, file category management, batch downloading and other aspects that users are more concerned about, which have been expanded and improved, allowing Xunlei to meet most of the professional needs of intermediate and advanced download users.