A network domain is an administrative grouping of multiple private computer networks or local hosts within the same infrastructure.[1][2][3] Domains can be identified using a domain name; domains which need to be accessible from the public Internet can be assigned a globally unique name within the Domain Name System (DNS).
A domain controller is a server that automates the logins, user groups, and architecture of a domain, rather than manually coding this information on each host in the domain. It is common practice, but not required, to have the domain controller act as a DNS server.[4] That is, it would assign names to hosts in the network based on their IP addresses.
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Compare: Anderson, Howard; Yull, Sharon; Hellingsworth, Bruce (2001). Higher National Computing (2 ed.). Oxford: Routledge (published 2004). p. 260. ISBN 9781136398988. Retrieved 2015-08-18. A network domain is more formally defined as a group for servers controlled by a primary domain controller. The idea is that this group of servers can behave as a single combined unit.
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Compare:
Chen, Lidong; Gong, Guang (29 May 2012). Communication System Security. Chapman & Hall/CRC Cryptography and Network Security Series. CRC Press (published 2012). p. 313. ISBN 9781439840368. Retrieved 2015-08-18. The terminology, network domain, comes from the cellular systems. Traditionally, a cellular service provider owns not only radio frequency spectrums but also certain network infrastructure, for example, base stations, switches, and servers. All these entities are connected through wired network to provide telephony service. A network domain is the wired portion of an operator's network.
^Postel, J (October 1984). "RFC: 920 - Domain Requirements". Internet Engineering Task Force. Archived from the original on 12 January 2021. Retrieved 27 January 2019.
^Archiveddocs. "Planning DNS Servers". docs.microsoft.com. Archived from the original on 2019-01-28. Retrieved 2019-01-27.
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