What are layer 2 scaling solutions in the context of Ethereum?

[zarazyana]

Layer 2 scaling solutions in Ethereum refer to techniques or protocols built on top of the main Ethereum blockchain that aim to increase its throughput and scalability without compromising decentralization or security.

[bitmover]

Layer 2 scaling solutions in Ethereum refer to techniques or protocols built on top of the main Ethereum blockchain that aim to increase its throughput and scalability without compromising decentralization or security.

There are many. You can read about them here
https://vitalik.eth.limo/general/2023/10/31/l2types.html

Examples
Arbitrum, Optimism, Scroll, polygon.

Each type has a different security degree according to this table

[NotATether]

Examples
Arbitrum, Optimism, Scroll, polygon.

I'm pretty sure that polygon is not Ethereum layer 2 solution and its own coin outright. I used Polygon to pay for stuff when ETH's fee became very high.

[bitmover]

Examples
Arbitrum, Optimism, Scroll, polygon.

I'm pretty sure that polygon is not Ethereum layer 2 solution and its own coin outright. I used Polygon to pay for stuff when ETH's fee became very high.

It is a layer 2, or side chain, of ethereum.

Take a look here.

https://www.coingecko.com/learn/polygon-vs-ethereum

What is Polygon?
Simply put, Polygon is a Layer 2 scaling solution for Ethereum. It aims to provide faster and cheaper transactions for Ethereum through sidechains. A sidechain is a separate blockchain connected to the main blockchain (in this case, Ethereum) through a two-way peg. The peg facilitates the transfer of data and assets – between the main chain and the side chains – while maintaining the main chain's security and immutability.

Also

Enter Polygon, which is a “Layer 2” scaling solution (or “sidechain”) that’s emerged to provide faster transactions and lower costs for users. It acts as a speedy parallel blockchain running alongside the main Ethereum blockchain.

https://www.coinbase.com/learn/crypto-basics/what-is-polygon#:~:text=Enter%20Polygon%2C%20which%20is%20a%20%E2%80%9CLayer%202%E2%80%9D%20scaling,parallel%20blockchain%20running%20alongside%20the%20main%20Ethereum%20blockchain.