Thread by @TamilKBase

What is Domain Name System (DNS)? | How DNS works?
DNS lets users connect to websites using domain names instead of IP addresses. Learn how DNS works.

A Thread 🧵 👇🏻

#DNS #Thread #CloudComputing #cloud #Security

DNS stands for Domain Name System.

DNS is the system that translates domain names into IP addresses, allowing your network to find the correct website and your browser to load it. Here is a breakdown of the five DNS steps involved in loading a webpage. 👇🏼

1️⃣ DNS Cache

When you search for a website, it will be stored on your system's DNS cache and retrieved from there if you have visited it before.

If cached, the rest of the DNS search ends here.

2️⃣ Resolver Server

If not cached, a query is sent to a DNS Resolver server, which will check its own cache for the requested website.

If not found, the request moves to the following DNS server type. 👇🏼

3️⃣ Root Server

Root servers are at the top of the DNS hierarchy.

They redirect Resolver Servers to another type of server called TLD servers.

4️⃣ TLD Server

TLD (top level domain) servers store information about domains ending with .com, .net, .org, and other ‘top level’ domains.

The TLD sends a response to the resolver that redirects to another type of server to find information about the searched domain.

5️⃣ Authoritative Name Server

The final stage is an Authoritative Name Server, which is responsible for knowing everything about the domain, including the IP address.

It sends the IP address information back to the resolver, then the client.

Congrats.. You learned what is DNS now 👏👏👏