--- title: "#layer articles | Hashnode" description: "Explore 4 articles tagged #layer on Hashnode. Tutorials, guides, and how-tos from the community." url: "https://hashnode.com/tag/layer" --- Tag # #layer 4 posts · 0 followers [Xeer Technology](https://hashnode.com/@XeerTechnology) · [Feb 5](https://hashnode.com/posts/cosmos-blockchain-a-complete-guide-for-beginners-and-businesses/698432b1577ddd7f805e3868) ### [Cosmos Blockchain: A Complete Guide for Beginners & Businesses](https://xeertechnology.hashnode.dev/cosmos-blockchain-a-complete-guide-for-beginners-and-businesses?utm_source=hashnode&utm_medium=feed) A beginner-friendly guide to Cosmos blockchain covering ATOM, IBC, interoperability, DeFi, NFTs, and enterprise use cases. 3 min read · [xeertechnology.hashnode.dev](https://xeertechnology.hashnode.dev/cosmos-blockchain-a-complete-guide-for-beginners-and-businesses?utm_source=hashnode&utm_medium=feed) [Ganesh Rama Hegde](https://hashnode.com/@hegde10122) · [Oct 30, 2025](https://hashnode.com/posts/chapter-8-testing-and-validating-the-getartusecase-domain-layer/6903c6a571310108347aa683) ### [Chapter 8 - Testing and Validating the GetArtUseCase (Domain layer)](https://androidavatar.hashnode.dev/chapter-8-testing-and-validating-the-getartusecase-domain-layer?utm_source=hashnode&utm_medium=feed) Now we shift our attention to testing the domain and the data layers for the GetArtUseCase. Step 1 : Testing the Domain Layer We want to verify that GetArtUseCase correctly transmits data from the repository. We only test the use case, not the databa... 3 min read · [androidavatar.hashnode.dev](https://androidavatar.hashnode.dev/chapter-8-testing-and-validating-the-getartusecase-domain-layer?utm_source=hashnode&utm_medium=feed) [Sourav Kumar](https://hashnode.com/@sovu) · [Jul 17, 2022](https://hashnode.com/posts/osi-model/62d401362f40e31decd8cc2e) ### [OSI Model](https://blog.souravk.cloud/osi-model?utm_source=hashnode&utm_medium=feed) Introduction to the OSI Model The OSI Model (Open Systems Interconnection Model) is a framework used to describe the functions of a networking system. The OSI model characterizes computing functions into a universal set of rules and requirements to s... 4 min read · [blog.souravk.cloud](https://blog.souravk.cloud/osi-model?utm_source=hashnode&utm_medium=feed)