Network of computers or other systems step from simple to complex. When a system is referred as complex and stochastic then the challenges of availability, dependability, stability and reliability become serious indicators for effective performance. Fault-tolerance plays a crucial role towards achieving dependability, reliability, stability and the fundamental requirement for the design and development of effective and efficient fault-tolerance mechanisms. It is also important that the power, weight, space and cost constraints of systems are addressed by efficiently using the available resources for fault-tolerance. In life critical mission systems, reliability is a great option, hence this paper investigate a fault tolerance mechanism using checkpointing in distributed systems.