1. The Domain Name System (DNS) helps people find the right website addresses, like an online phone book. When you type names like facebook.com or espn.com, DNS makes sure you see the correct website. Web browsers use IP addresses to connect and communicate with these websites.DNS’s primary function is to map domain names into corresponding IP addresses so that web pages can be seen by browsers.
2. In the internet world, every device has a unique IP address. Users no longer need to memorize IP addresses like 193.167.11.11 (in IPv4) thanks to DNS servers.
3. Any Device that is online on internet, is allocated specific IP address(IP address that is not assigned to any device. Alike to how a postal address send a letter to the right residence, this number enables other devices to recognize and connect with it. To ensure that the data arrives at the proper server, a process is initiated when a user uploads a webpage, changing the website’s name to its numerical IP address.
4. A thorough understanding of the DNS solution requires familiarity with the different DNS requests that must be processed. DNS validation occurs in the background within the web browser and does not require any further user involvement beyond the early request.
Types of DNS Modes:
- Iterative DNS Server
- Recursive DNS Server
DNS Server Iteration: 1. When a user finds “XYZ.com,” the request is transmitted over the internet to the DNS local resolution server. 2. Your internet service provider, or ISP, is  resolver.Your local DNS resolver will provide the domain IP address to the host if it has it in its cache memory; if not, it will transmit the query to a DNS root name server.
3. The root server is the main server that lacks IP address information and is unable to resolve it, It just provides information of TLD server (Top level domain Server).
4. The root server then responds with the TLD server IP address to the local (ISP). This stores information for domains (like.com,.net,.org, etc.).
request is forwarded to the local resolver (ISP) using the Authoritative DNS Server for the website IP address ABC.com. 5. To convert a name to an IP address, the local resolver queries the authoritative name server. After resolving the IP address, this server transfers it to the host via the local resolver (ISP). 6. The host then gets in touch with the web server to supply the content details for the webpage. DNS Server Recursive 1. When a user finds “XYZ.com,” an internet request is made to the DNS local resolution server. 2. Your internet service provider, or ISP, is this resolver.Your local DNS resolver will return the domain IP address to the host if it has it in its cache memory; if not, it will transmit the query to a DNS root name server (.). 3. The root server asks for the IP address from the TLD server.However, TLD has data regarding (.com,org,.net,.gov, etc.) then 4. TLD submits an inquiry to the authoritative