Network

servers, and service requesters, called clients.

communications network.

The Content-Type representation header is used to indicate the original media type of the resource (prior to any content encoding applied for sending).

MIME types, the client is able to understand.

All HTTP response status codes are separated into five classes or categories.

A duplex communication system is a point-to-point system composed of two or more connected parties or devices that can communicate with one another in both directions.

WebSocket is a computer communications protocol, providing full-duplex communication channels over a single TCP connection.

A conceptual model is a representation of a system.