It’s very common to type in the web address of a particular site on the browser to visit the site. Consider the Domain name server (DNS) as the phonebook of the virtual platform. The function of DNS is to translate human-readable domain names into machine-readable IP addresses.
Whether you are using a smartphone, a tablet, or a laptop to access the servers, you need the web address to find and communicate with the different sites. Humans can access online information through domain names, like XXX.com or ABC.net. But the web browsers will interact via the Internet Protocol of IP addresses. The domain name system is responsible for translating the domain names into IP addresses. Thus, without DNS, there will be no translation of the domain names to IP addresses. Therefore, the DNS is a critical element that aids in loading internet resources. Each device that connects to the internet possesses a unique IP address. The other machines will use this address to locate the device. DNS servers prevent the need to memorize the IP addresses which can be complex numerical combinations or alphanumeric IP addresses.
The process of converting the domain names into IP addresses is the task of the DNS resolution. The IP address is the essential part to find the particular internet device. It is unique for each device. These addresses are functionally similar to the house address of an individual which is mandatory to locate the home of that person at a particular location. When you want to load a webpage, the translation is necessary to convert the web addresses into the IP address. For example, you type in the web browser XXX.com. DNS will convert this address into an IP address like 000.11.1.1. and this address will get you to the desired website. As the DNS resolution procedure happens in the background, it's essential to learn more about them.
There are 4 DNS servers involved while loading a web page.
The two above elements are critical aspects of the DNS resolution system. Both concepts refer to the group of servers or servers that are integral parts of the DNS infrastructure. But the individual elements perform different roles. And the elements reside in different locations too, inside the DNS query’s pipeline. A very common way to differentiate the recursive resolver is that one is at the beginning of the DNS query, whereas the authoritative server comes at the end.
Recursive resolver refers to the computer that responds to the recursive request from the client. It takes time to track down the DNS record. The process involves making a series of requests until it reaches the DNS nameserver of the authoritative segment. There will be a time-out or other error if the request fails to track any record. However, the recursive DNS resolvers don’t need multiple requests to tracking down the records. They can respond to the client’s request with caching. Caching is the data persistence process that will aid in short-circuiting the necessary requests. It serves the requested resources record in advance in the DNS lookup.
The authoritative DNS server is responsible for holding the DNS records. This is the particular server that will lie at the bottom of the entire DNS lookup chain. It will respond to the resource record associated with the query. And this is the server that will finally allow the web browser to place the request for reaching the IP address leading to the website or web resources. The authoritative nameserver will satisfy the queries from the available data without raising another query for another source. So, it's good to conclude that it is the final source of truth when it comes to maximum DS records.