DNS stands for Domain Naming System; a protocol that provides the framework for web browsing. It is a system for converting alphabetic names into a numeric IP address for a computer to understand in its language.
It is a phone book of the internet as it keeps its address book of IP addresses. DNS connect through a domain naming server; also referred as DNS server or just Name Server manages a massive database that maps domain names to IP addresses. In short, DNS translates domain names to IP address so browsers can load Internet resources.
How does it work?
DNS works in following 7 easy steps:
- Using the internet connection and web browser, a user l their Internet Service Provider (ISP).
- Typically, when a user is connected to the internet, the modem or router that assigns users computer’s network also sends some important network configuration information to the user’s device.
- Using the web browser (Google Chrome, Mozilla Firefox, Microsoft Edge, Brave browser, Safari etc.) user types a URL into the address bar. For example, https://www.google.com/.
- The user’s computer then asks for the Internet service provider’s DNS servers for the specific IP address.
- Once the DNS server which holds the specific IP address for www.google.com is found, the DNS server responds by assigning an appropriate IP address to the user’s computer browser.
- Then the browser establishes a network connection to the server using the provided IP address and retrieves the page from the site requested.
- The browser is finally able to display the requested page on the user’s computer screen.
Purpose of DNS
- It is an organized naming system for computers, services and any other components that are connected to the internet or private network.
- DNS protocol is the only system in the entire world that helps you to browse the internet content. An Internet would not exist without DNS.
- DNS eliminates the need of remembering IP address that converts domain or subdomain names to IP address.
- DNS Servers offers fast internet connections. Organizations that use DNS servers can take advantage of high-speed internet connections.
- DNS is a distributed database that contains a small portion of hostname to IP address mappings contained with DNS database also known as a namespace.
- DNS server allows an internet user to use the internet resources without having to remember the port names and IP address.
- Translates domain names meaningful to humans into numerical identifiers associated with network equipment to locate and address those devices around the world.
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