What Is A Layer 2 Blockchain Protocol?

What Is A Layer 2 Blockchain Protocol?

October 3, 2022 by Diana Ambolis
Every sort of technology must evolve to meet the changing needs of consumers. Consider smartphones, which are constantly developing in terms of appearance and features. The requirement for blockchain network improvement provided a perfect foundation for developing layer 2 protocols for blockchain networks. When you think about blockchain, what do you think of when you
Matt Mosman on Blockchain Technology

Every sort of technology must evolve to meet the changing needs of consumers. Consider smartphones, which are constantly developing in terms of appearance and features. The requirement for blockchain network improvement provided a perfect foundation for developing layer 2 protocols for blockchain networks. When you think about blockchain, what do you think of when you think of Layer 2? The simple answer is that layer 2 protocols run in parallel with layer 1 protocols, or the primary network.

It’s understandable to wonder why layer 2 protocols were created in the first place. The following explanation will assist you in determining why layer 2 blockchain protocols and networks are being introduced. Along with the popular layer 2 protocols, you can learn more about the core concept of layer 2 protocols. In addition, the article discusses the advantages of layer 2 protocols as well as their future prospects.

What is a Layer 2, and how does it work?

The theme of advancements in blockchain networks is central to the definition of layer 2 blockchains. Do layer 2 solutions necessitate the creation of new, self-contained blockchain networks? It’s more vital to hunt for clear definitions of blockchain layers than to seek out complicated opinions. As a secondary protocol, layer 2 protocols work over another blockchain network. The foundation layer and layer 1 blockchains have no bearing on layer 2 protocols. The secondary protocols provide transaction verification while also reducing the number of jobs managed at the base layer.

The simple response to the question “What is a Layer 2 Blockchain?” gives a good idea of its importance in speeding blockchain transactions. It’s easy to see how the layer 1 blockchain’s lower load aids in speedier transaction processing. As a result, layer 2 protocols can handle a large number of users in a network. Why was it necessary to create layer 2 protocols in the first place?

Blockchain’s Common Layer 2 Protocols

The clearly visible value advantages in a layer 2 blockchain list also serve as remarkable indicators for demonstrating their significance. As blockchain technology becomes more widely adopted, layer 2 protocols must change to keep up. An analysis of the most common layer 2 protocols might help to clarify how they can be significant in the evolution of blockchain. Here’s a rundown of the most popular layer 2 protocols available today.

The blockchain that is nested

One of the earliest layer 2 protocols in blockchain networks is nested blockchains. The basic structure of nested blockchains consists of a primary chain and several subordinate chains. The efficient design of stacked blockchains means that one chain can readily work alongside another. In this example, the main chain is in charge of task assignment while also controlling the parameters. The secondary chains are responsible for conducting various main chain transactions as well as reporting for feedback and approvals.


Sidechains are frequently mentioned in debates on layer 2 protocols and networks. It’s a side blockchain that’s linked to the main chain by a two-way peg, as the name suggests. Consider a forest, where the trees are the secondary chain, and the forest is the primary chain. The primary goal of sidechains is to handle large batches of transactions. On blockchain networks, a sidechain could assist the primary chain in the validation of various transactions. As a result, the primary chain has enough time to address security concerns.

Channels of State

State channels are the next addition to the layer 2 lists, and they allow parties to interact directly on the blockchain network. State channels make it possible to conduct transactions without having to regard the primary chains. As a result, miners may spend less time verifying data, adding to increased processing rates.

State channels do not rely on transaction verification on the layer 1 blockchain. Instead of relying on smart contracts. When a transaction is successfully completed, the state channels ensure that the resulting state is stored on the primary layer. Due to the public exposure of the ledger, the documentation of the final transaction data on the ledger creates vulnerabilities.


The list would be incomplete without adding rollups to the list of layer 2 projects. Rollups are layer 2 protocols that allow calculations to be performed outside of the primary chain. The transfer of transaction details occurs after a predetermined time interval, allowing for record maintenance.

Furthermore, rollups can aid in transaction management without interfering with the core layer. As a result, rollups can easily increase throughput while lowering costs for blockchain transactions. Optimistic and zero-knowledge rollups are the two most common forms of rollups.

Also, read – Understanding Blockchain’s Layer 3 Protocol

Layer 2 Protocols’ Benefits

The benefits offered by layer 2 protocols will be mentioned in the discussion on blockchain levels. Here is the list of the benefits of layer 2 protocols in the present blockchain environment.

Improved Safety

The assurance of better security is the primary benefit of blockchain layer 2 protocols. In order Layer 1 network to gain scalability by adding blocks to the chain network and increasing the speed at which new blocks are validated. Layer 1 blockchain systems typically need to modify their base layer protocol to improve scalability. In a blockchain, layer 2 protocols aid in the avoidance of issues arising from changes in the blockchain architecture. Layer 2 solutions are consistent with the principal blockchain layer. Therefore no changes to the base layer or underlying protocol are required.

Scalability has been improved.

The second significant benefit associated with layer 2 protocols is the potential for increased scalability. Layer 2 protocols have been intended to ensure higher throughput, increasing scalability possibilities. Higher throughputs can make it easier to scale blockchain applications and provide better user experiences.

Transaction Fees are Reduced

Layer 2 protocols also provide a solution to another significant issue with traditional blockchain systems. Miners are responsible for validating transactions in a blockchain network and validating transactions using the blockchain’s cryptographic algorithms.

The traditional method required a lot of computational power from anyone who wanted to join the blockchain network. The importance of layer 2 protocols has resulted in a reduction in the amount of processing power required to validate transactions. As a result, layer 2 initiatives may be able to assist in the reduction of transaction fees on blockchain networks.

Despite the fact that Bitcoin and Ethereum have recently controlled a large portion of the crypto and blockchain space, other blockchain networks are emerging with significant benefits and use cases. Many DeFi ecosystems, as well as numerous decentralized apps, are emerging in the blockchain world. Layer 2 solutions can assist in meeting the demand that will occur as the blockchain ecosystem evolves.