Uptime is probably the most important single metric you can use to measure the performance of your Internet connection. It shows the time or percentage of the service is up and operational. The counterpart of that is downtime. It shows the time or percentage the service was unavailable.

Availability is basically the same as uptime. It’s often measured by “Nines”. Let’s see how they translate to downtime over the course of a year:

A Trade-Off Between Uptime and Costs

Usually, the higher the uptime guarantee the higher is the cost. Ideally, you should find the middle ground where the level of uptime gives you peace of mind and the costs don’t go through the roof.

Be wary when a budget carrier offers 100% uptime. They may really believe they can deliver but in reality, it rarely happens. No carrier will have 100% uptime in the long run. They may be up for a couple of months with no issues, but sooner or later something always happens. There are simply too many moving parts in a carrier’s network for something not to go wrong at some point.