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# Namespace Apache.Ignite.Core.Communication

### Interfaces

#### ICommunicationSpi

Communication SPI is responsible for data exchange between nodes.

Communication SPI is one of the most important SPIs in Ignite. It is used heavily throughout the system and provides means for all data exchanges between nodes, such as internal implementation details and user driven messages.

Only predefined implementation is supported now: TcpCommunicationSpi.