DNS
Domain Name System (DNS)
The Domain Name System (DNS) is like the phonebook of the internet. It helps us find the right number (an IP address) for a given name (a domain such as www.google.com).
DNS is organized like a tree, starting from the root and branching out into different layers.
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| Layer | Desc |
|---|---|
| Root Servers | The top of the DNS hierarchy. |
| Top-Level Domains (TLDs) | Such as .com, .org, .net, or country codes like .uk, .de. |
| Second-Level Domains | For example, example in example.com. |
| Subdomains or Hostname | For instance, www in www.example.com, or accounts in accounts.google.com. |
When we enter a domain name in our browser, the computer needs to find the corresponding IP address. This process is known as DNS resolution or domain translation. The steps below show how this process works. |
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