> ## Documentation Index
> Fetch the complete documentation index at: https://covalenthq.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Deciding which Node to run

Now that you have understood the basic operations on the Covalent Network, you can start exploring which nodes to run.

<CardGroup cols={2}>
  <Card title="Block Specimen Producer" icon="square-1" href="/docs/nodes/quick-start/block-specimen-producer-bsp/">
    The Block Specimen Producer securely extracts data from blockchains, creating what is known as *Block Specimens* - a bulk export method that ultimately leads to the generation of a canonical representation of a blockchain's historical state.
  </Card>

  <Card title="Block Results Producer" icon="square-2" href="/docs/nodes/quick-start/block-results-producer-brp/">
    The Block Results Producer re-executes or processes the Block Specimens further, producing enriched data outputs called *Block Results*, a comprehensive representation of block data returned from an RPC call to a blockchain node, with additional fields for in-depth analysis.
  </Card>
</CardGroup>