What are the design class types?

There are five different types of design classes and each type represents the layer of the design architecture these are as follows:

Class diagrams are the blueprints of your system or subsystem . You can use class diagrams to model the objects that make up the system, to display the relationships between the objects, and to describe what those objects do and the services that they provide. Class diagrams are useful in many stages of system design.

To ensure that the class provides the behavior the use-case realizations require . To ensure that sufficient information is provided to unambiguously implement the class. To handle non-functional requirements related to the class.