# Nodes Nodes are the individual servers that make up the network. Each node runs an instance of the App you are running, which allows it to participate in the network and perform various tasks, such as validating transactions and maintaining the shared ledger. Adding a node helps improve the network's scalability by increasing transaction processing capacity and enhances fault tolerance by providing redundancy and resilience to the network. \ Also, a Node is a logical function in the sense that multiple nodes of different types can run on the same physical server. With Spydra, you can run Peer nodes and Orderer nodes to participate in the network. Peers are the fundamental elements of a Hyperledger fabric network since they host ledgers and Smart contracts/Chaincodes. Orderer (also known as an “ordering node”) is responsible for transaction ordering, which along with other orderer nodes forms an ordering service. In addition to their ordering role, orderers also maintain the list of organizations that are allowed to create channels and enforce basic access control for channels. To learn more about Node types, please read [Nodes: Peer, Orderer & CA](/products-overview/private-network/networks/nodes-peer-orderer-and-ca.md) {% content-ref url="/pages/D26kvhImryJAwRIODi3L" %} [Create Node](/how-to/private-network/nodes/create-node.md) {% endcontent-ref %} --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.spydra.app/products-overview/private-network/networks/nodes.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.