WCF

Wcf is the windows communication foundation, which comes in dotnet 3.0 and 3.5,
you can communicate using http,tcp,msmq,It is service oriented architecture.

WCF is the Architecture, its divided into three types.

Using this you can communicate multiple platform, multifle servicies.

A-Address-when to communicate
B-Binding-how to communicate.
C-Contract-where to communicate

read ABC of WCF

Note:Webservice you can communicate only through http.

WCF comes up as a replacement for Remoting and Web service in dotnet.
The main feature of WCF is it's security. It can use the protocols like basice,wsHttp,tcp...wsHttp comes with default windows based security feature. WRT web services WCF works with the industry standard Contract based protocols. The componets WCF are data contract, Service Contract and the Service programme.