Connect to remote host syntax

In C #, when I use the code:

 public System.IAsyncResult BeginConnect(System.Net.EndPoint remoteEP, System.AsyncCallback callback, object state)

      

        
        
        
      

    

I declare EndPoint with the ip address of the remote host which binds to the port number. In this case, is the port number a port on my system or on a remote host?