DNS and WHO.IS –how it works and how the internet works for a website to appear on a browser.

DNS and WHO.IS –how it works and how the internet works for a website to appear on a browser.

WHOIS

WHOIS record refers a set information about registrants of the domains that include contacts, full names or biodata, in three sets of Administrative contacts, Technical Contacts, Registrant Contact, the data is maintain within domain registry operator database but it is the responsibility of domain registrar to ensure the whois data is correct as per ICANN guidelines.

DNS – Domain Name System is a centralized system that match the name – the domain name to the ip addresss of the server it is connected to.

Root Server

root server

root server

This is the first server that a servers recursive resolver . Root servers are usually operated by Registry operators for top level domains such as VeriSign. There are 13 root servers in the internet. VeriSign run two root servers out of the 13 root servers out there. VeriSign operates A Root and J root.

Root servers are the first server to give results in a DNS query.

There is a huge network of servers supporting the root server system strategically located across the globe to ensure that a request is served by the nearest server.. Verisign manages more that 143 Million domains and handles more than143 billion queries daily.

root servers

root servers

TLD Name Server

tld server

tld server

Top Level domain is( .com) while TLD while second level domain is (cloudpap.com). Each Top Level Domain DNS stores information on address of Second level domains. There a TLD server answer a query with the DNS IP address of the   domain.

The Domain Name Server.

Once a TLD Server returns the IP address of the DNS server. The DNS server usually is the custodian of the ip address of the particular domains. The Address is inform of an IPv4 (there are upto 4.3 billion IPv4)  and it is transiting  to IPv6 that has capacity of 10^36  ip address

Website

The Website is now visible on a browser,  After the recursive resolver has obtain the website or domain name   IP address, it feeds it to the browser which in returns send s request to retrieve content from the hosting server.

This takes a fraction of a second to complete.

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