That's the deep web, not the dark web. And yes, I agree with Derek that it's a bad name, partially because people confuse it with the deep web all the time.
Discussion
What's the difference here? I would assume they're the same, just different words being used to describe the same thing?
Dark web is tor/i2p et al (usually just referring to tor hidden services). Deep web is the segment of the normal WWW not indexed by search engines - internal company stuff behind logins, cloud storage, private forums etc.
That said, yeah, the two are mixed up and used interchangeably all the time. But they are separate concepts.