In Microsoft Message Queue (MSMQ) Server terminology, a name for a collection of computers in which any two computers can directly communicate. Computers in the same connected network must be running the same network protocol.
A connected network (CN) is essentially a label describing how MSMQ servers are related in an enterprise.
CNs are logical groupings of computers that can communicate directly using MSMQ messages. When you install an MSMQ server, you specify a connected network for each network address on the server.
When you specify connected networks for your MSMQ enterprise, it's a good idea to use meaningful labels so that administrators can easily select a connected network from a list when they need to override the default connected network settings.