On Friday, October 21, a series of Distributed Denial of Service (DDoS) attacks were launched against the servers of Dyn, a major DNS host. DNS hosts operate in a manner akin to a switchboard for the Internet, helping to route domain names (e.g., dataprotectionreport.com) to underlying IP addresses (e.g., 104.28.6.115). By attacking Dyn, hackers were able to prevent end-users from reaching the websites and online services that relied on Dyn, including Netflix, Twitter, Spotify, SoundCloud, Amazon, AirBnB, Reddit, PayPal, Pinterest, CNN, Fox News, the Guardian, the New York Times, and the Wall Street Journal. In a statement, Dyn described the attack as “a sophisticated, highly distributed attack involving 10s of millions of IP addresses.”