> For the complete documentation index, see [llms.txt](https://docs.zklink.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.zklink.io/key-concepts/modular-blockchain.md).

# Modular Blockchain

zkLink Nova is designed with a modular architecture, allowing for various components or modules to be easily interchanged, upgraded, or added as needed. This modular approach provides flexibility and scalability by combining multiple specialized blockchains and technologies.

**The functions that modular blockchains can specialize in are:**

* **Sequencing:** Collect and order transactions.
* **Execution:** Process transactions.
* **Settlement:** Dispute resolution and bridge.
* **Data availability:** Ensure data is available.

**For more details, we recommend reading:** 

{% embed url="<https://celestia.org/learn/beginners/the-modular-stack/>" %}