Noun
single point of failure (plural single points of failure)
A component in a device, or a point in a network, that, if it were to fail would cause the entire device or network to fail; normally eliminated by adding redundancy.
Synonyms: SPF, SPOF
All programs in the future will be written in a way that there is no single point of failure. There's no one server that can die and take down the service. Ray Ozzie