DNS or Domain Name System works like the telephone directory of the internet, it converts the easily memorable domain names into machine-understandable IPs. This process occurs in the background, making websites and online services accessible, which is why DNS plays a vital role in the functionality of the internet.
What is the work procedure of DNS?
DNS is an important tool for explaining how the internet works. It enables users to browse
websites by entering simple domain names rather than numbers known as IP addresses.
● Initial Request
It is important because when you type a website URL in your Browser, your computer checks its cache, RAM, router cache, or host files to see if it directly knows the IP address.
● Cache Miss and DNS Query
If the IP address is not stored in a cache, your computer sends a request to the DNS to
translate the domain name.
● Root Server Request
The DNS server, in turn, sends the query to a root server, asking it to forward the query to the TLD (Top-Level Domain) name server for the .com domain.
● Response from Root Server
The root server then sends the requester the IP address of the TLD.com name server.
● Querying the TLD Server
It then approaches the TLD name server and requests the IP address for the entered domain.
● Response from TLD Server
The TLD name server gives the authoritative name server.
● Final IP Address Resolution
The DNS server then sends a request to the authoritative name server for a particular IP
address.
● Delivering the IP Address
Finally, the authoritative name server returns the correct IP address of the requested web page.
● Returning the IP to the Browser
The IP address may be set back to the Browser, and the DNS may be translated.
● Local Cache Update
The IP address is saved in the cache memory of your computer to make subsequent
requests easier.
Conclusion
Knowledge of how DNS works is an ideal method of explaining the basics of how the internet communicates. With web browsing support, DNS guarantees uninterrupted access to resources and sites. DNS security solutions from the Top IT Services company in Edmonton, we try to prevent threats against this essential system and maintain the security and availability of your online experiences.
