Explain all parts of a deployment diagram?

Package: It logically groups element of a UML model.
Node: A physical system which represents a processing resource, example PC or a host machine.
Component: It�s the actual implementation or physical module of a UML system.
Node instance: It�s a runtime physical instance of a processing resource.
Component Instance: It represents an implementation unit that has identity at run time and can contain objects. A component could be contained within a node instance.
InterFace : It specifies the external operations of a class, component, package, or other element without specifying internal structure.
Object: Instance of a class.
Composition shape: It is a form of aggregation that indicates that a part may belong to only one element or life time of the element.
Communication: How an actor Dependency: Shows relationship between two elements.
2-Element Constraint: It shows a constraint on two classes or associations. OR constraint: It shows an OR constraint on two classes or associations.