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A study published Tuesday by Sandvine Inc. shows that Netflix movies and TV shows account for nearly 30 percent of traffic into homes during peak evening hours, compared with less than 17 percent for Web browsing.
Only about a quarter of homes with broadband subscribe to Netflix, but watching movies and TV shows online takes up a lot of bandwidth compared with Web surfing, email and practically every other Internet activity except file sharing and videoconferencing.
As late as last year, both Web surfing and peer-to-peer file sharing — mainly the illegal trading of copyrighted movies — were each larger than Netflix's traffic.