# ExtraChain Node Types

ExtraChain nodes form data-exchange clusters to speed up local data transactions and requests and create faster connections between network parts.

ExtraChain node types:

* User node – ordinary user. This node can be any device (mobile device, PC, low-performance server). It stores only required part of chain and uses data from other nodes;
* Cluster node – high-performance node with high-speed connection to other clusters. It stores all data of blockchain and provides it for all nodes;

As it shown at cluster scheme, decisionmaking is protected by different connections between clusters. This structure type allows fast data transfer and reliable data exchange for all types of devices.

![Cluster network scheme](/files/-Ma2wou7OYIikaKRac2S)


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