# Supported topologies Connected products can have various topologies. 1. **Direct communication** with the Blynk.Cloud. Cellular or Ethernet devices can connect to the Internet and authenticate in Blynk.Cloud 2. **Gateway (hub)** topology. In this setup, the gateway is connected to the Internet, and nodes are sending the data to the gateway. The gateway then processes the messages and sends them to the Blynk.Cloud 3. **Mesh Network**. This is similar to the gateway setup above, but in mesh networks, each device can reroute messages from any device to the gateway {% hint style="warning" %} For hub/gateway or mesh topologies, you would need to use HTTP API to tunnel messages from the nodes to the Blynk.Cloud. These messages will contain AuthToken of the node and will be identified this way. {% endhint %} --- # 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.blynk.io/en/commercial-use/supported-topologies.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.