Internet Outage That Crashed Dozens Of Websites Caused By Software Update

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A widespread internet outage caused several major websites to shut down Thursday afternoon, including Amazon, Delta, Capital One and Costco.

Akamai, a content distribution network that helps with the spread of data around the internet, posted on Twitter that a software configuration update caused a bug in its DNS system.

A DNS, or domain name service, helps match a website's name to its IP address. If the DNS fails, it becomes impossible to search and connect to a website by name.

The outage lasted approximately one hour. Akamai says it rolled back the software configuration update. By around 1:13 p.m. ET, the site read "all systems operational."