Blockchain Developer Certification Practice

What is the primary function of Ethereum's P2P network?

1. To store data in a central database

2. To allow users to send cryptocurrency through traditional banks

3. To enable peer-to-peer connectivity and communication between nodes

4. To facilitate offline transactions

The correct answer is: To enable peer-to-peer connectivity and communication between nodes

The primary function of Ethereum's P2P network is to enable peer-to-peer connectivity and communication between nodes. In a decentralized blockchain network like Ethereum, the P2P network plays a crucial role in how data is transmitted and shared among all participants—referred to as nodes. Each node in the network stores a copy of the entire blockchain and contributes to the verification of transactions. This decentralized connectivity allows for direct interactions among users without needing intermediaries, ensuring that transactions and smart contract executions can occur in a trustless and efficient manner. As nodes communicate and synchronize with one another, they collectively maintain the integrity of the blockchain, facilitating transparency and security throughout the network. The other options denote functions that do not represent the true essence of Ethereum's P2P network. For example, storing data in a central database contradicts the fundamental decentralized nature of blockchain technology. Traditional banks do not play a role in blockchain transactions, as the system is designed to operate independently of such financial institutions. Additionally, offline transactions cannot be supported in a network that relies on real-time P2P connectivity and blockchain updates.