# Active Replication Fabric Control Structures

> The eXtremeDB Active Replication Fabric feature (ARF) is configured by specifying the parameters and bit mask values described below.

> ### For an overview see page ARF Applications in C

> Please use the links below to view Reference Guide pages for the eXtremeDB Active Replication Fabric control structures:

> iot_communicator | ARF (IoT) Communicator Structures
> iot_replicator | ARF (IoT) Replicator Structures
> iot_callbacks | ARF (IoT) Callback Structures