, the root zone has been overseen by the Internet Corporation for Assigned Names and Numbers (ICANN), with management performed by its subsidiary acting as the Internet Assigned Numbers Authority (IANA), with distribution services provided by Verisign.Prior to this, ICANN performed management responsibility under oversight of the National Telecommunications and Information Administration (NTIA), an agency of the United States Department of Commerce.The root.servers file contains addresses of servers which can supply a list of the root servers (this file is typically called or in a standard BIND distributions).
To avoid this circular dependency, the address of at least one root server must be known for bootstrapping access to the DNS.Note: Knowlegeable readers will spot that the file illustrated is not the current (2013) root-servers file. " ; configuration file of BIND domain name servers). ; ; This file is made available by Inter NIC ; under anonymous FTP as ; file /domain/; on server FTP. While it is possible to fit more entries into a packet of this size when using label compression, thirteen was chosen as a reliable limit.Since the introduction of IPv6, the successor Internet Protocol to IPv4, previous practices are being modified and extra space is filled with IPv6 name servers.
According to Assistant Secretary of Commerce for Communications and Information, Lawrence E.