Domain Name System is a service that can be installed on any windows server operating system to resolve the Name to IP Address and vice-versa. TCP/IP networks, such as the Internet, use DNS to locate computers and services through user-friendly names.
DNS is the most critical infrastructure, that’s publicly available for use to everybody out there. You can in fact say that, it’s a single point of failure, that can take down the World Wide Web.
Without DNS we can not imaging internet. You know before DNS how websites were getting resolved Name to IP address. At that time, We use the host file and make the point the website names to web server where websites were hosted. this was manually task and not possible to do for all websites and it was required on each and every systems where you want to access the websites by name.
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