Web domain uptime
There are multiple servers now operative on the wireless and dedicated datacenters that cater to exclusive needs of a variety of customers. Hosting or web domain uptime basically refers to the percentage of time for which the host is accessible. There are a number of internet service providers who claim to aim for 99.9% uptime, but it is good to be aware of and watchful of the different server restarts and planned or unplanned maintenance requirements in a hosting environment. Host or web domain uptime providers claim server uptime that msot often only refers only to a server being powered. It does not include or account for network downtime.
The fact is that real downtime can be potentially more than the percentage guaranteed by the particular provider. There are many providers who combine the uptime and accessibility within the SLA or the Service Level Agreement. These agreements may or may not include refunds or reduced costs in event of non- performance.