MehadiHasan
Newbie
- May 7, 2021
- 7
- 0
At first we have to know what is domain. A domain name is a human readable name like any website name is a domain name or we can say what we type in a web browser URL field that is domain name. There is a corporation ICANN assigned and manages domain name and numbers.
Top level domain(TLD) type such as com - Commercial businesses, gov - government agencies, edu - educational institution like university, org - organization mostly non profit, mil- military, net- network organizations etc.
then there is second level domain that comes before TLD the name of that website. is second level domain also there are many sub domain.
So when a user type any URL address into the browser the operating system's DNS client will check for information in a local catch. If the request address in not there, it will look for a Domain Name System server in the local area network. When the local area server receive the query and the requested domain name found it will return the result to user. If the name is not found the local server will forward the query to a DNS cache server often provided by the internet service provider. Since the DNS server's cache contains a temporary store of DNS record it will quickly respond to request.
This is how DNS work.
Top level domain(TLD) type such as com - Commercial businesses, gov - government agencies, edu - educational institution like university, org - organization mostly non profit, mil- military, net- network organizations etc.
then there is second level domain that comes before TLD the name of that website. is second level domain also there are many sub domain.
So when a user type any URL address into the browser the operating system's DNS client will check for information in a local catch. If the request address in not there, it will look for a Domain Name System server in the local area network. When the local area server receive the query and the requested domain name found it will return the result to user. If the name is not found the local server will forward the query to a DNS cache server often provided by the internet service provider. Since the DNS server's cache contains a temporary store of DNS record it will quickly respond to request.
This is how DNS work.
