mechanics (such as filling out forms over and over) to get said file. Also, there may be bugs in the site's detection or download methods (or both), thus forcing the user to obtain the file directly. Another example is when the site maintainer tries to identify the user's platform, and the user is simply using something other than the target platform to download the file (for example, using a Microsoft Windows system to download a Linux program, where the same program is built and offered for both platforms). Therefore, some users may collaborate on sites other than the one offering the desired files, and post URLs which they have identified as being for the desired file. Thus a user wanting the same file does not have to endure the impediments encountered from the original site's maintainers, and simply obtains the file directly. See also File hosting service Client–server model File sharing Hypertext Data transmission