Open DNS, (Pros and Cons)
ubuntuforums.org › showthreadOct 16, 2012 · First, you're not susceptible to an outage by an ISP or any other service. Conversely, you ARE susceptible to an outage on your own hardware, and that's much more likely if you discount deliberate outages by your ISP. Second, DNS makes a significant bit of traffic for web browsing.