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What Is Layer 1 in Blockchain?

Layer 1 refers to a base network, such as Bitcoin, BNB Chain, or Ethereum, and its underlying infrastructure. Layer-1 blockchains can validate and finalize transactions without the need for another network. Making improvements to the scalability of layer-1 networks is difficult, as we’ve seen with Bitcoin. As a solution, developers create layer-2 protocols that rely […]

Instructor Gergő Várhegyi
Updated March 23, 2022

About Course

Layer 1 refers to a base network, such as Bitcoin, BNB Chain, or Ethereum, and its underlying infrastructure. Layer-1 blockchains can validate and finalize transactions without the need for another network. Making improvements to the scalability of layer-1 networks is difficult, as we’ve seen with Bitcoin. As a solution, developers create layer-2 protocols that rely on the layer-1 network for security and consensus. Bitcoin’s Lightning Network is one example of a layer-2 protocol. It allows users to make transactions freely before recording them into the main chain.

Course Content

What Is Layer 1 in Blockchain?
Layer 1 refers to a base network, such as Bitcoin, BNB Chain, or Ethereum, and its underlying infrastructure. Layer-1 blockchains can validate and finalize transactions without the need for another network. Making improvements to the scalability of layer-1 networks is difficult, as we’ve seen with Bitcoin. As a solution, developers create layer-2 protocols that rely on the layer-1 network for security and consensus. Bitcoin's Lightning Network is one example of a layer-2 protocol. It allows users to make transactions freely before recording them into the main chain.

  • Introduction
  • What is layer 1?
  • Layer 1 scaling
  • SegWit
  • What is layer-1 sharding?
  • Layer 1 vs. Layer 2
  • Lightning Network

Layer 1 blockchain examples
Now that we know what layer 1 is, let's look at some examples. There's a huge variety of layer-1 blockchains, and many support unique use cases. It's not all Bitcoin and Ethereum, and each network has different solutions to the blockchain technology trilemma of decentralization, security, and scalability.

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