What is the use of DNS (Domain Name System)?

0
18
DNS

From our childhood, we all have learned mathematics. We all can lot of methods, formulas that we have practiced when we were small. But not every other number can be remembered. Computers can’t understand characters, they understand only the binary language. To make it more specific it is converted into different values so that humans can understand. Imagine if a user has to type in numbers while visiting any website, User would have a hard time remembering IP addresses. Yes, IP addresses are the main address that is used to connect with the website. To make this scenario more simple. DNS is introduced. Either it is the best cloud companies in India or it can be any kind of networking company. Everyone needs DNS.

DNS(Domain Name System)

Every device is connected over the internet has its unique IP address and if any device is requested. These IP addresses are used to find the requested device. As told earlier that humans can’t remember IP addresses all the time. That’s why DNS is used. DNS (Domain Name System) converts the human-readable characters into IP addresses. For example – Humans can’t remember IP address – https://49.50.102.149 all the time. But they can remember https://www.cyfutture.cloud. Remembering characters is much easier than numbers. Cloud hosting in India understands the need for DNS that’s why they are constantly working towards providing their own DNS addresses.

DNS Working

The process of DNS resolution involves transforming a hostname into network IP addresses. An IP address is designated for each device that is connected over the network. For example – a street address is used to find the house. When a user wants to load a webpage, When a user requests a webpage, a conversion occurs between a user request and the machine-friendly address. This address is necessary to find the requested webpage. To better understand the DNS resolution, you must understand the hardware components of a DNS query. DNS runs behind every web browser and requires only the initial request.

Types of DNS Involvement in Loading a Webpage: –

DNS Recursor – DNS recursor works as a librarian who is requested to find a precise book in a library. DNS recursor is designed to receive DNS queries from client machines.

Root Nameserver – The root server is the early step used in converting human-readable hostnames into IP addresses. You can say it as an index in a library that points to different racks of books. It basically serves other specific locations.

TLD (Top-Level Domain) Nameserver – TLD can be specified as a rack of books in a library. Here, a nameserver is used in searching a specific IP address and it also serves as a last portion of the URL.

Authoritative Nameserver – Here, the nameserver is thoughtful as a dictionary on the counter of books. A particular name is converted into the definition. This is the last stop in the nameserver query. If it contains the requested record it will return a positive response. With a requested hostname back to the DNS recursor that has made the initial request.

DNS Resolver

DNS lookup first stops at the DNS resolver is responsible for dealing with the client that has made the first request. The resolver initializes with the sequence of queries that leads to a website. A website that is being translated into the IP address. It is always important to know the difference between a DNS resolver and a recursive. A DNS recursive resolver is a request that accepts a recursive query and responds by doing required requests.

Type of DNS Request

In a typical DNS lookup, there are three types of queries. With these combinations, DNS resolution can conclude to reduce long-distance travel. In an optimal situation, cached record data is accessible that allows DNS to rebound with a non-recursive query.

Types of DNS Queries: –

Recursive Query – In a recursive query, a DNS server will respond to the client either with an error message or with a requested resource record that can’t find the record.

Iterative Query – In this situation, the DNS client grants a DNS server to return the appropriate answer. If it is unable to respond with the exact query name, it will respond with the referral to a DNS server authoritative for a below level of the domain namespace. DNS client will make a query to the referral address. This process continues with the add-on DNS query chain until a timeout occurs.

Non-recursive Query – This occurs in the DNS resolver client for a record that it has access to because it’s an authoritative record. Or the record exists inside the cache. Normally, a DNS server will cache the DNS records to prohibit them from additional bandwidth consumption and load on the upstream servers.

Browser DNS caching –

Modern web browsers are designed by default to reserve memory for DNS records. The main purpose is here to make DNS caching closer to the web browser. And to take less processing in order to verify cache and correct requests to an IP address. When a DNS request is made, the web browser will cache and store the initial location which is checked for the requested record.

Operating System DNS Caching – Operating system level DNS is the last local setup before a DNS query that leaves your machine. The process inside your operating system is developed inside your operating system to check “stub resolver” or DNS client. When a stub resolver receives a request, it will visualize its own cache and verifies if it holds the DNS record. If it does not hold the record, it will send the DNS query outside the network to a DNS recursive in the ISP (Internet Service Provider).

Conclusion

Thus, DNS has its own importance. DNS is a necessity while connecting with any IP address over the internet. It does play an important role, Cloud providers are maintaining their own space on the internet to offer industry-leading services. Connect with the best cloud providers and get the finest cloud plans and services right now.

LEAVE A REPLY

Please enter your comment!
Please enter your name here