Diameter
Read this article about the history of Diameter and why it was developed. What preceded Diameter as an authentication protocol? While you do not need to understand how Diameter authenticates, you should have a general idea of its authentication process.
7.Result
7.7.Uninitialization API SUCCESS
UnInitialization API is called (having no parameter) resulting in SUCCESS of
UnInitialization of Stack by de-allocating all its resources.
Figure 13: UnInitialization API SUCCESS