Final answer:
To create a messaging service, you would need to develop a messaging server to store and deliver messages, a connection service to allow communication between clients and the server, and a client application for users to send and receive messages.
Step-by-step explanation:
If you want to create your own messaging service, there are several critical components that must be developed to ensure a functioning and reliable service. These components include:
- A messaging server that stores messages from senders and allows receivers to retrieve the messages. This server acts as an intermediary, temporarily holding messages until the recipient is able to receive them.
- A connection service that can connect to a client to deliver the messages. This involves the creation of protocols and infrastructure for reliable data transmission.
- A client application that can connect to another client to deliver a message. However, this is not typically part of a server-client messaging service, as direct client-to-client communication would bypass the server.
- A client application that connects to the messaging service, which is essential for both sending and receiving messages. This client would interact with the server's API or other interfaces to facilitate communication.
The most essential components often developed are the messaging server that manages the message storage and retrieval, and the client applications that allow users to send and receive messages through the messaging service (what would be option a, b, and e from the original list).