diff --git a/ComputingServices/ComputingServices.vbproj b/ComputingServices/ComputingServices.vbproj
index 62e908a..5da91ba 100644
--- a/ComputingServices/ComputingServices.vbproj
+++ b/ComputingServices/ComputingServices.vbproj
@@ -208,6 +208,7 @@
   </ItemGroup>
   <ItemGroup>
     <Compile Include="DistributeServices\CenterController.vb" />
+    <Compile Include="DistributeServices\Registry\RegistryProtocol.vb" />
     <Compile Include="DistributeServices\Registry\Protocol.vb" />
     <Compile Include="DistributeServices\Registry\Registry.vb" />
     <Compile Include="DistributeServices\GridNode.vb" />
diff --git a/ComputingServices/DistributeServices/Registry/RegistryProtocol.vb b/ComputingServices/DistributeServices/Registry/RegistryProtocol.vb
new file mode 100644
index 0000000..d79af65
--- /dev/null
+++ b/ComputingServices/DistributeServices/Registry/RegistryProtocol.vb
@@ -0,0 +1,17 @@
+Namespace DistributeServices
+
+    Public Enum RegistryProtocols
+        ''' <summary>
+        ''' Send a ping to ask if it is a grid node?
+        ''' </summary>
+        IsANode
+        ''' <summary>
+        ''' Send a ping to ask if it is a registry of the <see cref="CenterController"/>
+        ''' </summary>
+        IsAPool
+        ''' <summary>
+        ''' A grid node sign up and registry in this computing grid
+        ''' </summary>
+        SignUp
+    End Enum
+End Namespace
\ No newline at end of file