I have created three windows services in which two services listening two different logical ports continously and one service capture COM ports. These windows services informs the Main Window Application which is also running in different Application Domain or Window Process space. These services and windows application is created in C# .NET

My Question is that which is the best way to communicate between these Windows Services running on the same machine (locally).

1. DOT NET Remoting Services
2. Message Queues
3. Through Socket
4. Through Database

Reliability and scalibility is the main requirement because this machine act as a server and traffic is very high.

Your co-operation would be highly appreciated.
Thanks

Zeeshan