This is becoming a more common question as more ISPs are adding monthly bandwidth limitations. People need to be able stay under their bandwidth limits, or else get charged for that extra bandwidth they use.
Why Netflix uses so much bandwidth
Netflix delivers movies and TV shows streaming straight to your internet-enabled device, such as a computer, PS3, Wii, etc. This streaming process uses bandwidth, which registers as data that has been downloaded. According Netflix, if you are watching an HD movie with 5.1 surround sound, you will have about 2.2 gigabytes in download in just one hour. That’s using their highest quality, no slow-downs on the network, speed.
Netflix does attempt to scale their streaming quality based on your available bandwidth and if there are any slow-downs with the network, which allows for the best video quality your connection can support. This does not, however, allow you to determine how much bandwidth you’re going to be using or how much you have used for the month already.
Why is this a problem for ISPs?
Imagine that your connection to the internet is a road. Your road merges with main roads as you get further from your connection, and finally, you hit the freeway (known as a backbone). Now, the more people on the road, the slower things are going. When everyone is coming home from work, the speed limit is 65 MPH, but you may only be going 25 MPH because of the traffic. It’s a similar concept with the internet and your speed. Netflix adds a huge amount of traffic to all of these roads, and that creates a strain for the ISPs that are carrying these backbones. Now imagine Netflix as a two-trailer semi truck completely loaded. It causes other traffic to be slow, it takes up a lot of space, and can create cracks on the road. If Netflix was in use by all of its subscribers and there were no bandwidth limits, it would be like Los Angeles during rush hour.
What can I expect from Netflix?
In terms of bandwidth, if you were to watch 60 hours of non-HD content a month, you would be at about 62 gigabytes. If all of that was the highest quality HD with surround sound, you would be at about 134 gigabytes for that month. And that doesn’t include any other downloads, web browsing, or games being played online. All of these activities use bandwidth, and it all adds up.
In terms of what Netflix plans to do about it, it is still up in the air. According to a blog post, Netflix allows users in Canada to reduce their streaming quality. This is due to the fact that Canadian ISPs have severe bandwidth limits, and this has been conflicting with the Netflix service.
When Netflix will bring this option to the US, or if they will at all, is anybody’s best guess.
photo credit: PseudoGil