What is domain and name server?

What is the domain name?

If anyone wants to come to your office, then he has to know the address. For the website, this address is its name, which is called Domain Name. This domain name will be unique identifying your website. Everyone in the world will recognize and access the website using this name.

What is Domain Name System (DNS)?

Computer or network software but can not directly understand a domain name. He understands network addresses or IP addresses. So an IP address is assigned to each domain name. Without using the domain name, this IP address can also go directly to the website. It is difficult to remember IP addresses, usually 12 digits. So in reality everyone uses domain names, but your computer's IP addresses need to know that for any type of communication. During the first network ARPANET, a file named host.txt was written by all the computer names and its IP address. It is not easy to write an IP address when the network has billions of computers. Because IP addresses are constantly connected and changed. To solve this problem, a system with continuous, dynamic and distributed database has been set up, which is called Domain Name System. Domain names are divided into several levels. There are about 250 top level domains, all of them are in a tree stack under them.
There are about 19 top level domains based on the content of the website. Among these are .com for general websites, .biz for business websites, .info for news and other information sites, .org for organization, .net for online service providers. Almost every country has its own top-level domain, such as Britain's .uk, Japan's .jp, United States .us, India .in Bangladesh .bd etc.

What is the DNS name server and how does it work?

The world's domain names, they have got a tree-like structure. This tree is divided into several zones. The responsibility of all the domain names in a zone is called the authoritative DNS name server. The Dns nameserver is responsible for matching IP addresses with all the computer domain names in its zone. If not, tell top level domain and arrange them accordingly. The whole thing can be interpreted as a post office. Suppose you write a letter. If the recipient's address is within the area of your local post office, then they will be conveyed. And if not, they will first see the recipient's address in a country. Then he will send the post to the country's main post office. From there to the post office of the division or the city's city, then in the upazila, then the letter will be sent to the local post office. Therefore, Kalam of Dinajpur and the Kalam of India in Dinajpur can be reached exactly as soon as possible. Finding this address in domain names is called address resolving, and it works just like the post office.
Now if the .com resolver wants to know the IP address of esoft.com.bd, then first he will ask the DNS nameserver com for his zone. Since esoft.com.bd is in the same zone, it will tell its nameserver. But if he wants to know the IP address of bondhu.com.in, then the nameserver of .com can not report it. Then this DNS query will be sent to the top level in Zone's Nameserver. From there to com Nameserver. Since he knows the IP address of bondhu.in, he will tell .in in the answer.

What is the DNS name server and how does it work?

The world's domain names, they have got a tree-like structure. This tree is divided into several zones. The responsibility of all the domain names in a zone is called the authoritative DNS name server. The Dns nameserver is responsible for matching IP addresses with all the computer domain names in its zone. If not, tell top level domain and arrange them accordingly. The whole thing can be interpreted as a post office. Suppose you write a letter. If the recipient's address is within the area of your local post office, then they will be conveyed. And if not, they will first see the recipient's address in a country. Then he will send the post to the country's main post office. From there to the post office of the division or the city's city, then in the upazila, then the letter will be sent to the local post office. Therefore, Kalam of Dinajpur and the Kalam of India in Dinajpur can be reached exactly as soon as possible. Finding this address in domain names is called address resolving, and it works just like the post office. Now if the .com resolver wants to know the IP address of friendinfotech.com, then first he will ask the DNS nameserver com for his zone. Since friendinfotech.com is in the same zone, it will tell its nameserver. But if he wants to know the IP address of bondhu.com.in, then the nameserver of .com can not report it. Then this DNS query will be sent to the top level in Zone's Nameserver. From there to com Nameserver. Since he knows the IP address of bondhu.in, he will tell .in in the answer.