Answer - WCF is a platform for building distributed apps or services among multiple endpoints in Windows. The initial name for WCF was Indigo and it was designed for building service-oriented apps and offers interoperability too. The WCF is abbreviated as Windows Communication Foundation; this is a popular programming model that is suitable for designing service-oriented apps. It can be used to create or deploy services that are easily accessible by multiple clients worldwide. It provides an environment where a particular service is accessible by windows or Linux clients both. The features of WCF are just the endless when compared to any other web service. WCF technology has been proposed by the Microsoft and it could be accessed through multiple protocols like HTTP, TCP, MSMQ and more.