In the following section the IPC keyname "REGISTER" is being used as an example. IPC keynames must be unique for each listener on the same system, if the keyname "REGISTER" is used on the first of two listeners then the second listener must have a different keyname, e.g., "REGISTER2". If the setup already has IPC configured then it is a personal choice whether to create additional keys for registration, pre-exising IPC protocol address keynames can also be used for COST.