As this is your first post, I will point out to you that there is a highly valuable Search feature installed at the top of page, which leads to any and all instances of previously asked questions and/or answers to same.
It's a good idea to start there and see if your answer is already available.
Likewise, it's a good idea to search other resources, both web-based and not.
Any reasonably complete article, book, site covering the topic of configuration management will have an opinion about what each of these are. If you're lucky, they might even have an authoritative and accepted definition.
Once you've explored these other options at your leisure, please feel free to come back and ask any clarifying questions that remain to you. We will be waiting eagerly for the opportunity to help you. [img]images/icons/smile.gif[/img]