> For the complete documentation index, see [llms.txt](https://hash-network.gitbook.io/hashnetwork/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://hash-network.gitbook.io/hashnetwork/core-concepts-and-architecture/1.-depin-layer-decentralized-physical-infrastructure-network.md).
# 1. DePIN Layer (Decentralized Physical Infrastructure Network)
The DePIN Layer is the backbone of the Hash Network, facilitating decentralized content access through a network of gateways. It consists of two main components:
* **Gateway Nodes:** These are critical entry points for data, handling requests, and ensuring seamless and secure communication between clients and the network. Gateways are geographically distributed to reduce latency and ensure high availability. They integrate advanced caching mechanisms like NGINX and Varnish to store frequently accessed content, optimizing performance and providing a faster, more reliable user experience. Additionally, Gateway Nodes are scalable and can handle increased traffic by adding more nodes and distributing the load efficiently.
* **Guardian Nodes:** These nodes play a pivotal role in maintaining network integrity by overseeing and validating transactions and operations. Acting as trusted entities, Guardian Nodes ensure that the decentralized infrastructure remains secure, trustworthy, and resilient against malicious activities.
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