Final answer:
Virtualization, cloud computing, and containerization are used to deploy identical copies of an IS or PIT system in specified environments.
Step-by-step explanation:
One method used to deploy identical copies of an IS or PIT system in specified environments is the use of virtualization. Virtualization allows multiple instances of an operating system or application to run on a single physical server, enabling the creation of identical copies across different environments. This can be achieved through the use of virtual machines or containers.
Another approach is cloud computing. Cloud providers offer the ability to create and deploy multiple instances of an IS or PIT system in different environments using predefined templates and configurations. This allows for easy replication and scaling.
Lastly, containerization technology, such as Docker, can be used to package an IS or PIT system along with its dependencies into a lightweight container. These containers can then be deployed across different environments, ensuring identical copies with minimal overhead.