Techniques for building dependable distributed systems: multi-version software testing

To investigate the effectiveness of serializable back-to-back testing and other issues in multiversion software systems, an experiment was performed. The authors discuss the use of multiple implementations for fault prevention throughout development, particularly during the testing phase. The specifications chosen were written in languages that meet industrial standards. The application is a communication protocol based on the Open Systems Interconnection (OSI) layered model adopted by the International Organization for Standardization (ISO) in 1979. The OSI layered model is introduced, the generation of appropriate test cases is discussed, and the testing environment is presented. The serializable back-to-back testing paradigm is presented in detail, along with testing results.<>