Domain Name System

DNS (Domain Name System) is a system that translates domain names into IP addresses. It is a hierarchical naming system that assigns domain names to IP addresses, which are then used to access websites and other online resources. The DNS system makes it possible for users to access websites using human-readable domain names, rather than having to remember long strings of numerical IP addresses. DNS is an essential part of the internet infrastructure and is used in almost every internet activity.

What are the 3 types of DNS?

  • Recursive DNS
  • Authoritative DNS
  • Caching DNS

Who controls DNS?

The Internet Corporation for Assigned Names and Numbers (ICANN) is the organization responsible for managing and coordinating the Domain Name System (DNS) globally. ICANN works with various entities, including domain name registrars and internet service providers, to ensure the proper functioning of the DNS.

How do I find my DNS server?

Here are some general steps to help you find your DNS server:

  • On a Windows computer, click the Start menu and type "cmd" in the search bar to open the Command Prompt. On a Mac computer, open the Spotlight search by pressing Command + Spacebar and type "terminal" to open the Terminal app.
  • In the Command Prompt or Terminal, type "ipconfig /all" (Windows) or "networksetup -getdnsservers Wi-Fi" (Mac) and press Enter. This will display the network settings for your computer, including the DNS server address.
  • Look for the line that says "DNS Servers" or "DNS Server Addresses." The number(s) listed after this line are your DNS server addresses.
  • You can also check the DNS settings in your router or modem. Refer to the manufacturer's instructions on how to access the settings page, and look for the DNS server information.

If you're having trouble locating your DNS server, contact your Internet Service Provider (ISP) or network administrator for assistance.

What port number is DNS?

The port number for DNS (Domain Name System) is 53.

Difference between DNS and Smart DNS?

DNS (Domain Name System) and Smart DNS (Domain Name System) both serve the same purpose, but they differ in the way they function.

DNS is the system that translates human-readable domain names into IP addresses that computers can understand. It acts as a phone book for the internet, translating domain names into IP addresses so that the computer can access the website or server. DNS servers are operated by Internet Service Providers (ISPs), which means that your internet traffic is routed through these servers.

Smart DNS, on the other hand, is a service that uses a different type of DNS server that can route specific types of traffic through a proxy server located in another country. Smart DNS is used primarily for unblocking geo-restricted content, which is when a website or service is only available in certain countries. Smart DNS can trick the website or service into thinking that the user is accessing it from a different location.

In summary, DNS is a system that translates domain names into IP addresses, while Smart DNS is a service that can route specific types of traffic through a proxy server located in another country to unblock geo-restricted content.

BY Best Interview Question ON 20 Feb 2023