# DA Layer

Data Availability Layer is not only the storage of B² Network, but also the validation layer of B² Network.

DA Layer consists of three parts: [**Decentralized Storage**](https://github.com/b2network/docs/blob/main/decentralized_storage.md), [**B² Nodes**](https://docs.bsquared.network/technical-design/da_layer/b2_nodes), and **Bitcoin Network**.