What is DNS Server ?
DNS allows the users to connect two different websites with the help of domain names instead of IP addresses . The full form of DNS stands for domain name system and it was like the phone book of the internet . It is Meant to access information online through domain name instead of IP address . web browsers interacting through internet protocol address translate domain names to IP address the browsers can portray internet websites on screen.
Every device that is connected to the internet comes with a unique IP address which is difficult for other machines to find . button service usually eliminate the requirement of humans to remember the IP address available in numeric forms .
You Can also go through : 192.168.0.1
How does a DNS service exactly work?
DNS resolution basically involves converting the website address into the computer IP address . a separate IP address is ap.ed to each device over the internet and that is very necessary to find the the device address . whenever a user load a page there should be translation occurring immediately so that there is a machine friendly address that can easily locate the web page
You must understand the workability of different hardware components which the DNS query is expected to pass . For most of the websites, DNS query takes place in the background.
What is the exact difference between a recursive DNS resolver and a DNS server?
Both the concepts are referred to the group of services that are important for the DNS infrastructure . Each of it has a different role play in lives in different locations within the pipeline of a DNS query.
- An important way to think about the difference of the the recursive resolver is regarding the commencement of the DNS query and the end of the authoritative
- name server .
- Recursive DNS resolver
Talking about the recursive resolver, it refers to a computer that immediately responds to the recursive request arising from the end of the client . it takes a certain time to track the exact DNS record in order to use it for these reasons . it takes place with the help of several requests reaching the authoritative DNS name server for the requested record.
There is not always a requirement to make multiple requests in order to track down the required records . cache data is a persistent process that results in the short circuit of the necessary request by taking a note of the requested resource record .
To put it in very simple words, an authoritative DNS server is the thing that actually holds the DNS resource records . it is also responsible for the same . This particular server is located at the bottom of the DNS is the thing that responds to the queried resource record . it allows the web browser making the request to reach out the IP address that is needed to access the website web address.
Authoritative name server also has a role play to satisfy queries that arise from its own data and it does not require any query from another source. It serves as the final source for the evidence of certain DNS records.
It should be mentioned that in certain instances where there is the query for subdomain , an additional name server is added to the sequence of the authoritative name server that is responsible for keeping the name of the subdomain.
Where does the DNS caching occur?
The purpose is to temporarily store data in a certain locations that results in the better performance and reliability of the data request . DNS caching involves data storage closer to the requesting client in order to resolve the DNS query.