Introduction to DNS (Domain Name System)
In the world of networking, computers don’t know by names like humans do, they go by numbers. That’s how computers and similar devices talk / identify each other over a network, which is by using numbers such as (Internet Protocol Address) IP addresses.
Domain Name System use for:
Humans on the other hand are comfortable by using names instead of numbers, whether is talking directly to another person or identifying a place, or thing, humans identify with names instead of numbers. To reduce the communication gap between computers and humans and make the communication of a lot easier, networking engineers developed (Domain Name System) DNS. DNS (Domain Name System) resolves names to numbers, to be more specific it resolves domain names to IP addresses. When you type in a browser like Internet Explorer, Chrome etc. DNS will resolve the name to a number because the only thing computers know are numbers.
So, for example, if we would like to open a certain website, we would open our web browser and type in the domain name of that website like www.google.com. Now technically you really don’t have to type in google.com to retrieve the Google web page, we can just type in the IP address instead if we know Google.com IP address. But since we are not familiar to remembering and dealing with numbers, especially when there are millions of websites on the internet, we can just type in the domain name instead and let DNS convert it to an IP address for us.
When we type in google.com in your web browser the DNS server with search through its database to find a matching IP address for that domain name, and when it finds it will resolve that domain name to the IP address of the Google web site, once that is done then your computer is able to communicate with a Yahoo web server and retrieve the webpage.
