A DNS server that answers request for DNS root zone is a root name server. It also redirects request for a specific top level domain (TLD) to that TLD, s name server. A local implementation DNS is allowed to have its own private root name servers. The term root name server is mainly used to mention the 13 popular root name servers that are used to implement the root name space for the official global implementation of the domain name system of internet. A full stop character is employed to regard as ending by the entire domain name in the internet.
The full stop is normally implied rather than explicit as while the translation of a domain name to an IP addressed is attempted, the final dots are not vastly needed by the modern DNS software. The entire domain such as .com, .org, .net etc is confined within root domain. Whenever the resolving of a domain name is required by an internet computer, asking each name server in turn about to element to its left, it works right to left. The root name server does have the idea about the servers that are responsible for the top level domains. The top level domain has its own servers that delegate the name servers which are responsible for the top level domain.
For example .com basically answers queries for IP addresses of sub domains or hosts (such as www). There is not a great deal of change very often in most of this practice and it gets cached. Just 2 / 100 of all queries to the root servers were legitimate according to a survey made in 2003. 75/100 queries were the results of incorrect and non existing caching with the addition of some 12.5 percent of unknown TLDs along with some 7 percent for lookup using IP addresses as if they were the domain names. Updating the root server’s record with the TLD is not correct and it was tried by some mis-configured desktop computers.
The problems and the fixed recommendation can be found on the list of RFC 4697. There is specification of some 13 name servers in which the lettres range from A to M. seven of them represents many multiple geographical location even though they are not the actual servers. The strategy of using the similar names was set later but before the older servers had their own names. The protocol limitations restrict any more names. The root servers are outside USA as a result of being mostly physical than the nominal.