Fundaments in WCF

Please follow these URL For Fundamental thing in WCF
1.  http://www.dotnetspider.com/forum/194633-Fundaments-WCF.aspx
 2. http://www.aspskills.com/windows-communication-foundation-wcf/397/
Difference between WCF and Web service 
1.   http://www.aspskills.com/difference-between-wcf-and-web-service/388/
wcf interview questions 
1.   http://www.aspskills.com/wcf-interview-questions/571/