system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why would Time Warner Cable go down across the country simultaneously?

On the downdetector website, it's showing that Time Warner is down from coast to coast. What would cause such a significant outage?
gpt
Their DNS likely went down. It is also possible that their connection to the internet were interrupted  at some sites. There is redundancy but if the mechanism that enforces that redundancy, like load balancers, goes down itself, you can see the problem. 

And it's strange that this happened to Fios recently, same Dns problems and same website selective outages that another DNS server could not fix.