Peer-to-peer file sharing
Users can use software that connects in to a peer-to-peer network to search for shared files on the computers of other users (i.e. peers) connected to the network. Files of interest can then be downloaded directly from other users on the network. Typically, large files are broken down into smaller chunks, which may be obtained from multiple peers and then reassembled by the downloader. This is done while the peer is simultaneously uploading the chunks it already has to other peers.
File hosting services
File hosting services are a simple alternative to peer-to-peer software. These are sometimes used together with Internet collaboration tools such as email, forums, blogs, or any other medium in which links to direct downloads from file hosting services can be embedded. These sites typically host files so that others can download them.
Downloading Without Paying: Why is it illegal?
When a movie or song is produced and marketed, everyone involved in the process has monetary gains from the sale of that product. Therefore, that product is protected by copyright law so that it cannot be copied, reproduced or resold without their permission. If you did not pay for a song, movie or other media file that has a copyright, then downloading that file is a crime. Likewise, distributing a copyrighted media file, whether via electronic or non-electronic methods, without the express permission of the copyright holder is also illegal.
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Who’s Watching?
The two primary groups that police the downloading of music and movies are the Recording Industry Association of America (RIAA) and the Motion Picture Association of America (MPAA). These two groups constantly monitor downloads and websites for copyright violation. They tend to pay close attention to colleges and universities. When they see that a song or movie has been downloaded illegally, they notify