Princeton University: Networks: Friends, Money, and Bytes

* Duration: 12 weeks
* Free online course
* Start date: 19 March 2018

You pick up your iPhone while waiting in line at a coffee shop. You google a not-so-famous actor, get linked to a Wikipedia entry listing his recent movies and popular YouTube clips of several of them. You check out user reviews on Amazon and pick one, download that movie on BitTorrent or stream that in Netflix. But suddenly the WiFi logo on your phone is gone and you're on 3G. Video quality starts to degrade, but you don't know if it's the server getting crowded or the Internet is congested somewhere. In any case, it costs you $10 per Gigabyte, and you decide to stop watching the movie, and instead multitask between sending tweets and calling your friend on Skype, while songs stream from iCloud to your phone. You're happy with the call quality, but get a little irritated when you see there're no new followers on Twitter. You may wonder how they all kind of work, and why sometimes they don't.

What questions will we answer?

- What Makes CDMA Work for My Smartphone?
- How Does Google Sell Ad Spaces?
- How Does Google Rank Webpages?
- How Does Netflix Recommend Movies?
- When Can I Trust an Average Rating on Amazon?

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