In the current work of information technology, computers are dumb devices if they cannot communicate over the network. A normal person would never know the details behind the way the data move from their computer to another computer somewhere on the network or internet. They would never know how their application on their browser or their computer talks to the server on the internet to grab the necessary data.
Fundamentally most of the network engineers use OSI model as the reference point of understanding how computer systems communicate over the network. The OSI model is a conceptual mode and not a physical implementation and it is a way of thinking how data travels across the network and also assists us in network troubleshooting.
Let us see an example of what happens when you open a web browser with the address https://www.google.com on a company network.As soon as you enter https://www.google.com your computer would try to convert that web address to an ip address that would require it to know the DNS server ip address you are referring to. Your company network might have an internal DNS address which would be referred to find the public ip address of dns website.
