A Cisco 7301 router and a Juniper M7i, part of the K root-server instance at AMS-IX
A root name server is a name server for the 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 resolving human-readable host names into IP addresses that are used in communication between 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.[1][2] The use of anycast addressing permits the actual number of root server instances to be much larger, and is 1,733 as of March 4, 2024[update].[3]
^Mark Andrews, ISC (11 November 2011). "Reason for Limited number of Root DNS Servers". bind-users (Mailing list). Retrieved 8 January 2016.
^"DNS root server FAQ". Netnod. Retrieved 18 January 2016.
namespaces. Internet nameservers implement the Domain Name System. The top hierarchy of the Domain Name System is served by the rootnameservers maintained by...
RFC 2826. The DNS root zone consists of pointers to the authoritative domain nameservers for all top-level domains (TLDs). The root zone is hosted on...
13 rootnameserver addresses that can be accommodated in DNS name query responses. However the root zone is serviced by several hundred servers at over...
deploying DNSSEC within the root zone. At the meeting it was announced that it would be incrementally deployed to one rootnameserver a month, starting on December...
hacking in which corrupt Domain Name System data is introduced into the DNS resolver's cache, causing the nameserver to return an incorrect result record...
Domain Name System lookups. List of DNS record types - possible types of records stored and queried within DNS Rootnameserver - top-level nameservers providing...
organization. ISC was designated as a rootnameserver operator by IANA, originally as NS.ISC.ORG and later as F.ROOT-SERVERS.NET.[citation needed] In January...
In Internet computing, NSD (for "nameserver daemon") is an open-source Domain Name System (DNS) server. It was developed by NLnet Labs of Amsterdam in...
authoritative nameservers it knows about – the root zone nameservers (indicated by the full stop or period), which contains nameserver information for...
Knot DNS supports DNSSEC signing and among others hosts root zone (B, K, and L rootnameservers), several top-level domains. Knot Resolver is an open source...
Open RootServer Network (ORSN) was a network of Domain Name System root nameservers for the Internet. ORSN DNS root zone information was kept in synchronization...
level domains not found in the official DNS root zone temporary unavailability of the ISP's nameserver Public DNS resolver operators often cite increased...
Internet Corporation for Assigned Names and Numbers (ICANN) threatened to revoke its contract to administer the rootnameservers. ICANN published the extensive...
Internet exchange points and manages one of the thirteen rootnameservers for the Domain Name System (DNS). It also distributes the official Swedish time...
operates the F rootnameserver, Vixie at one point joined the Open RootServer Network (ORSN) project and operated their L rootserver. In 1995 he cofounded...
system (OS), the actual name of this account might be root, administrator, admin or supervisor. In some cases, the actual name of the account is not the...
series of failed simultaneous attacks against nine of the thirteen rootnameservers.[page needed] Calce was born in the West Island area of Montreal,...
directory server or nameserver is a server which provides such a service. Each resource on the network is considered an object by the directory server. Information...
networking, a proxy server is a server application that acts as an intermediary between a client requesting a resource and the server providing that resource...
implementations by inspecting the handshake parameters. In 2010, a rootnameserver run by Netrod in China started returning poisoned DNS results to global...
introduction of new generic top-level domains (TLDs), and the operation of rootnameservers. The numbering facilities ICANN manages include the Internet Protocol...
Windows Server 2012, codenamed "Windows Server 8", is the ninth version of the Windows Server operating system by Microsoft, as part of the Windows NT...
the owner of PKNIC to open an office in Lahore and deploy a mirrored rootserver (m-2.pknic.net.pk) in what once used to be his hometown. "PKNIC to set...
Global Information