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How DNS Works

Like humans communicate with each other, computers also do communicate with each other, but not by the names; they have their unique numbers, such as IP addresses over a network. Humans are customized to address by the names instead of numbers to identify a person or a site. To communicate between computers and humans, networking engineers developed a Domain Name Server (DNS). This blog is curated about how DNS works. But before that, What is DNS?<br><br><br><br>

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How DNS Works

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  1. How DNS Works? www.infosectrain.com | sales@infosectrain.com

  2. Like humans communicate with each other, computers also do communicate with each other, but not by the names; they have their unique numbers, such as IP addresses over a network. Humans are customized to address by the names instead of numbers to identify a person or a site. To communicate between computers and humans, networking engineers developed a Domain Name Server (DNS). This blog is curated about how DNS works. But before that, What is DNS? www.infosectrain.com | sales@infosectrain.com

  3. What is DNS? Domain Name Server (DNS) is a system that includes a database of the public IP addresses with website names. It acts as a resolver that converts domain names to IP addresses. If a user wants to open Google on the chrome page, DNS will resolve the name Google and check for the IP address in the cache memory. Based on the IP address, the computer gets connected with the web server and retrieves the web page to perform various actions on the Google web page. How Does DNS Work? DNS works collectively to resolve the IP address for the domain name with various DNS servers. If you type a domain name in the web browser and the system can’t find the IP address in its cache memory, it will redirect the query to the Resolver server. The Resolver server is an Internet Service Provider (ISP); it checks for the IP address in its cache memory. If it can’t find the IP address, it will further redirect the query to the root server. The Root server is the top server of the DNS hierarchy, including 13 sets of root servers around the world. Each set of the root servers has its unique IP address. When the root server receives the query for the IP address but can’t find it, and sends the query to the TLD. www.infosectrain.com | sales@infosectrain.com

  4. 4. The TLD server is the Top-level Domain Server that stores various address information for the domains such as .net, .com, .en, .org, and more. When the query is received but can’t find the IP address, the TLS redirects the resolvers to the Authoritative Name Servers. www.infosectrain.com | sales@infosectrain.com

  5. 5. The Authoritative Name Server is responsible for knowing everything about Domain, including the IP address. When the query is received from the DNS resolver, the authoritative name server should respond to the server with the IP address. And the DNS resolver will communicate with the system to retrieve the web page. Once the DNS resolver receives an IP address from various servers, it stores the IP address in its cache memory. In case, if the computer sends the same query for the same domain name, it can retrieve the IP address from memory and mitigates the whole DNS Server process in the search for the IP address. Final Words InfosecTrain is one of the best IT Training and consulting platforms that offers an instructor-led training program on various IT security and cybersecurity domains. It provides the Network Security Training course by the well-experienced and certified trainers to cover a wide range of Networking concepts. To know more details, check out and enroll now. www.infosectrain.com | sales@infosectrain.com

  6. About InfosecTrain • Established in 2016, we are one of the finest Security and Technology Training and Consulting company • Wide range of professional training programs, certifications & consulting services in the IT and Cyber Security domain • High-quality technical services, certifications or customized training programs curated with professionals of over 15 years of combined experience in the domain www.infosectrain.com | sales@infosectrain.com

  7. Our Endorsements www.infosectrain.com | sales@infosectrain.com

  8. Why InfosecTrain Global Learning Partners Access to the recorded sessions Certified and Experienced Instructors Flexible modes of Training Post training completion Tailor Made Training www.infosectrain.com | sales@infosectrain.com

  9. Our Trusted Clients www.infosectrain.com | sales@infosectrain.com

  10. Contact us Get your workforce reskilled by our certified and experienced instructors! IND: 1800-843-7890 (Toll Free) / US: +1 657-722-11127 / UK : +44 7451 208413 sales@infosectrain.com www.infosectrain.com

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