ClusterConnectionMode =

{ Single, Multiple }

ClusterType =

{ Unknown, StandAlone, ReplicaSet, Sharded }

Replica Set Name = <String>

Decision tree:

• if mode is Single
  • if type is Unknown
    • set type to whatever the server responds with
  • else if server's type != type
    • remove server from cluster
  • else if server's replica set name != replica set name
    • remove server from cluster
• else (mode is Multiple)
  • if type is Unknown
    • set type to the type of the first server to respond
  • if server type != type
    • remove server from cluster
  • else if server's replica set name != replica set name
    • remove server from cluster
  • else if server type is StandAlone and there is more than one server
    • remove all but first server