FT

fault tolerance or fault-tolerant

Fault tolerance enables a system to continue operating properly in the event of the failure of some of its components. When the operating quality decreases at all, the decrease is proportional to the severity of the failure.

TCP fault tolerance allows reliable two-way network communication using links that may be imperfect or overloaded. It does this by requiring the communication endpoints to expect packet loss, duplication, reordering and corruption, so that these conditions do not affect data integrity.