DNS is a core part of internet. Without it, the internet as we know of today, cannot function. For instance, take an example of a giant phone directory where you can find contact numbers of all. Simply, assume DNS as a vast directory where one can find the IP address for any domain name. How can we say that DNS (Domain Name System) is important?
How DNS Works?
Computers and other devices connect via IP addresses to identify each other. Instead of numerical series, it is simple to memorize alphabetical words like www.google.com. Therefore, we (humans) prefer to use domain names and not the IP address. The purpose of DNS (Domain name system) is to bring the two together and push forward to your specific destination. Imagine this, you want to reach Yahoo.com from your browser, internet will first automatically connect to the IP address of webserver you requested. Then it will allow you to download data from that source. Remember, internet runs on IP address and not on domain names. This is where DNS (Domain name system) comes in and makes everyone’s life easier by syncing up domain names with IP addresses. It is more of an integral database to online business operations, financial transactions, and all web-based communications.
What is DNS server?
DNS server is a physical server that’s designed to store all information and data of DNS database. These DNS servers are able to manage myriad of requests every day. Once a visitor types in a web address into their laptop’s browser, a DNS server receives the enquiry and search out the IP address, and forward it to that user’s device to the genuine site they are looking for – remember all of this happens in few seconds.
Vulnerability of DNS
There are two types of DNS servers:
- Authoritative name servers
- Recursive name servers
Authoritative server is a DNS server that holds complete information about any DNS query, whereas recursive name server search the query in its local cache. On your behalf, it will forward your query to other DNS servers until it gets the final result. Owing to this, it is more susceptible to cyber-attacks. Cyber attackers can steal your login details, passwords, hijack email accounts, and extract your confidential information and so on.
Almost everything relies on DNS system. In fact, whole internet depends on accuracy of DNS servers that helps exchange information.