In what can be a complicated arrangement, cloud companies sometimes exist to keep other cloud companies online. When one of those links is broken, others may fall.
CloudFlare, which uses cloud technology to block website attacks, was forced offline for an hour on March 3, 2013. The San Francisco startup has more than 500,000 websites, including e-commerce companies and blogs, using its services. CloudFlare blamed the outage on routers, highlighting how a technical weakness in one part of a cloud system can have ripple effects throughout the network.
It also showed that even companies that protect others in the cloud need protection themselves.
Special Report: Cybersecurity in the Cloud