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Ethereum: two-way communication protocol between clients
The Ethereum network is a decentralized, open-source blockchain platform that enables the creation of smart contracts and decentralized applications (dApps). One of the key features of Ethereum is its client-server architecture, which provides two-way communication between clients. In this article, we will take a detailed look at how clients on different sides of the Ethereum connection interact with each other.
TCP connection
When client A opens a connection with another client B, it establishes a TCP (Transmission Control Protocol) connection on port 8333. This is common practice in network protocols that require communication between several parties.
However, the question remains: Can both clients use this connection for requests and responses? The answer is yes, but with some limitations.
Customer A Requests
When client A wants to ask questions or send data to client B, it can do so over an established TCP connection. Client B will respond with requested information or data back to Client A.
However, if client B needs to request clients outside of this local network (ie, requests that are not related to the Ethereum blockchain), the TCP connection is not suitable for two-way communication. In such cases, client B needs to establish a new TCP connection from its local machine to an external server or another client on the same network.
Answers by Client B
On the other hand, client B can send data back to client A over an established TCP connection. This is useful when clients exchange information in real time, for example, during transactions or when exchanging files.
However, if client B needs to ask questions or send requests outside of this local network, it needs to establish a new TCP connection from its local machine to an external server or another client on the same network.
Example of two-way communication
Let’s illustrate it with an example. Suppose we have two clients, Alice and Bob. Customer A wants to request “What is my balance?” in real time, while client B is not currently connected to the Ethereum network. To establish a connection between them, Alice establishes a TCP connection on port 8333 from her local machine.
Client B can then send requests back to Alice over this connection, requesting updates to her balance. If Bob wants to ask Alice questions or share data with her outside of this local network, he will need to establish a new TCP connection from his local machine to an external server or to another client on the same network.
In summary, although clients A and B can use their established TCP connections for requests and responses, they also have the ability to exchange information in real time over these connections. However, if the requests are not related to the Ethereum blockchain, it is necessary to establish new connections either from the client’s local machine to an external server, or with another client in the same network.
This two-way communication protocol is a fundamental aspect of the Ethereum platform, allowing clients to interact with each other and facilitating the creation of complex applications and decentralized services.
