How does the concept of layers describe flow of information or communications?

The ISO refers to open systems interconnection model ordinarily wont to standardize and reason the inner functions of the communication system by dividing it into completely different layers. This model consists of seven abstract layers with every enjoying a unique operate. The layer could serve the layer higher than it or the layer below it. there's error-free communication inside layers throughout the network, layers conjointly offer a path required by application to send or receive packets across the network.