Q3. what is illustrated

- It is illustrated in the deployment diagram the physical configurations of software and hardware and the depict of a static view of the run-time configuration of processing nodes and the components that run on those nodes.
- In other words, deployment diagrams show the hardware for our system, the software that is installed on the hardware, and the middleware used to connect the separate machines to one another. This diagram is used for applications that are deployed to several machines.
- Also, deployment diagrams illustrate on how to explore the architecture of embedded systems and showing how the hardware and software components work together. In short, we may want to consider creating a deployment diagram for all but the most trivial of systems.

example of deployment diagram:



source: http://vinci.org/uml/deploymentx.html

The above diagram captures the distinct number of computers involved and shows the communication modes employed.Since,deployment diagram focuses on the physical implementation of the system.