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The various transport modules which can be configured are:

| Module | Parent Module | Description |
| ------ | ------------- | ----------- |
| rpc_app | rpc | Configure control plane RPC environment used by Celeborn within the application. For backward compatibility, supports fallback to `rpc` parent module for missing configuration.<br/> Note, this is for RPC environment - see below for other transport modules |
| rpc_service | rpc | Configure control plane RPC environment when communicating with Celeborn service hosts. This includes all RPC communication from application to Celeborn Master/Workers, as well as between Celeborn masters/workers themselves.<br/> For backward compatibility, supports fallback to `rpc` parent module for missing configuration.<br/>  As with `rpc_app`, this is only for RPC environment see below for other transport modules.|
| rpc | - | Fallback parent transport module for `rpc_app` and `rpc_service`. It is advisible to use the specific transport modules while configuring - `rpc` exists primarily for backward compatibility |
| push | - | Configure transport module for handling data push at Celeborn workers |
| fetch | - | Configure transport module for handling data fetch at Celeborn workers |
| data | - | Configure transport module for handling data push and fetch at Celeborn apps |
| replicate | - | Configure transport module for handling data replication between Celeborn workers |


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