Marco,
These items are probably best defined in the PMBOK Guide or a relevant study guide. Use them for context. A quick synopsis:
Change Management Plan: how we are going to use change control methods (such as a change management board) on the project?
Configuration Management Plan: how are we going to keep track of the different versions, or configurations, of our product or service on the project?
Change Control Board: the body that approves baseline changes to the project such as time, cost, and scope.
Configuration Items: the components of a product or service that are configured during each version change
Change Log: how we keep track of the baseline changes on our project
- Steven