You can use deployment diagrams to model the physical
layout or topology of a system. Deployment diagrams describe the
configuration of runtime processing nodes and the artifacts that
are deployed on them.
You can create one or several deployment diagrams
to illustrate the physical nodes on which your system executes or that
support execution, as well as their physical connections and their
relationships. You can add diagram elements to represent the nodes
that exist in your system and you can add connectors to illustrate
the relationships that exist between nodes.