WCF Services that are exposed to clients are through Endpoints.Endpoints forms the base while exposing service to clients.A Service can include one or more endpoints.
Endpoints Consists of three basic Components:
1.Address : Where is the service located ?
2.Binding: Protocol used to communicate with service (http,tcp etc..)
3.Contract:Contracts(Interface/Method definition) that has to be exposed to clients. Consumers/Clients uses this Contract to generate proxy.