K-root
A root name server is a name server for the DNS root zone, root zone of the Domain Name System (DNS) of the Internet. It directly answers requests for records in the root zone and answers other requests by returning a list of the authoritative name servers for the appropriate top-level domain (TLD). The root name servers are a critical part of the Internet infrastructure because they are the first step in Resolver (DNS), resolving human-readable host names into IP addresses that are used in communication between host (network), Internet hosts. A combination of limits in the DNS and certain protocols, namely the practical size of unfragmented User Datagram Protocol (UDP) packets, resulted in a decision to limit the number of root servers to thirteen server addresses. The use of anycast addressing permits the actual number of root server instances to be much larger, and is 1,553 . Root domain The DNS is a hierarchical naming system for computers, services, or any resource particip ...
[...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]