Let Assume you order something online.
Let us say that a person is living in India. He/She orders something from the US via an online shopping site.

How does the shipment of the order take place?

• The online shopping site will send the ordered item to a delivery company in the US.

• The delivery company's US branch will transport the ordered item from US to it's branch in India

• After coming to the destination (India), the item will be handed over to the online shopping site's vendor, in the destination location, for delivery.

• The online shopping site will then deliver the order to the person's doorstep.

The internet also follows a similar working system.

The layer from where we order and received the item, i.e, the layer from which a person is interacting is called the Application Layer.
It is an application. Users interact with the app but how it works internally is not known to the users.

There are different networking models which describes the architecture, components, and design used to establish communication between the source and destination systems

There exists predominantly two types of networking model-

• Open Systems Interconnection (OSI) Model.

• Transmission Control Protocol/Internet Protocol (TCP/IP) Model.

Check my dedicated blog for each model

Thank You💌