# 3. Boundary Chain Design

- [3.1 PoD+PoW Consensus Mechanism](/boundarychain/getting-started/3.-boundary-chain-design/3.1-pod+pow-consensus-mechanism.md)
- [3.2 Tendermint Algorithm](/boundarychain/getting-started/3.-boundary-chain-design/3.2-tendermint-algorithm.md)
- [3.3 Blockchain Characteristics](/boundarychain/getting-started/3.-boundary-chain-design/3.3-blockchain-characteristics.md)
- [3.4 Boundary Cross-Chain Communication (BCC) Protocol](/boundarychain/getting-started/3.-boundary-chain-design/3.4-boundary-cross-chain-communication-bcc-protocol.md)
- [3.5 Modular Design](/boundarychain/getting-started/3.-boundary-chain-design/3.5-modular-design.md)
- [Application Layer](/boundarychain/getting-started/3.-boundary-chain-design/3.5-modular-design/application-layer.md)
- [Transaction Layer](/boundarychain/getting-started/3.-boundary-chain-design/3.5-modular-design/transaction-layer.md)
- [Data Layer](/boundarychain/getting-started/3.-boundary-chain-design/3.5-modular-design/data-layer.md)
- [Execution Layer](/boundarychain/getting-started/3.-boundary-chain-design/3.5-modular-design/execution-layer.md)
- [3.6 Boundary AI Framework](/boundarychain/getting-started/3.-boundary-chain-design/3.6-boundary-ai-framework.md)
