How to organize the processing of messages from several servers?

Question

.NET

Please let me know if there is any proven solution for this problem.
Given: 1 server that "listens" to 3 other servers, this server can also send requests to all 3 servers that it "listens".
All of these servers have a bunch of different commands that they ask server #1 to run.
Commands can be different, from deleting files, to starting processes and notifying about the work done.
How can you competently, with the possibility of extension, organize work in C #? Will any patterns from GoF help in solving this issue?

Answer 1

General concept and model: one and two .
Specific implementations and protocols: pure messaging, platform independent: AMQP , ZeroMQ ; also, if we are talking about dotnet, you can try WCF .