InterLINQ is an IQueryable Provider implementation. LINQ stands for Language Integrated Query and is one of the most important and powerful features of the new .NET 3.5 Technology. A LINQ Query is represented by an Expression Tree.
Multi-Tier functionality is not provided by LINQ, but this new technology makes it possible by serializing a the Expression Tree of the LINQ Query and sending it to a WCF Service. The Remote Service deserializes this Expression Tree and starts the execution. Return value of the Remote Service's called method is the result of the executed query.