The DNS or Domain Name Server feature also referred to as web hosting allows the selection and provision of a particular IP address from multiple addresses when a DNS request arrives. In terms of server reliability, the DNS database maps a host name to their IP address. So instead of using a hard to remember series of numbers (IP address) we just type in your web browser www.yourdomain.com, in order to access your website.

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It usually takes a few days to propagate the DNS information through the World Wide Web. So in case of domain registration or transfer, it takes a while before the user can access your website. This delay in the process could raise security issues if the website is hosted on multiple servers. So if something goes wrong with one server, this would imply that your website too would go down.