# What is layer 2?

By [xinfei](https://paragraph.com/@xinfei) · 2022-05-07

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Layer 2 (L2) is a collective term to describe a specific set of Ethereum scaling solutions. **A layer 2 is separate blockchain that extends Ethereum and inherits the security guarantees of Ethereum**.

Now let’s dig into it a bit more, and to do this we need to explain layer 1 (L1).

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*Originally published on [xinfei](https://paragraph.com/@xinfei/what-is-layer-2)*