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Subdomain Definition

subdomain

Contents

English

Pronunciation

Etymology

sub- +‎ domain

Noun

Wikipedia has an article on: Subdomain

Wikipedia subdomain (plural subdomains)

  1. A domain or sphere that is part of a larger domain or sphere.
    • 1971, Jacob Robert Kantor, The logic of modern science
      As a technical subdomain of biology ecological investigations have evolved from what has been traditionally called natural history.
  2. (computing, Internet) A domain name that has been prefaced with additional parts separated with periods.
    • 1987 November, P. Mockapetris, Domain Concepts and Facilities, RFC1034, also known as STD0013
      A domain is a subdomain of another domain if it is contained within that domain. This relationship can be tested by seeing if the subdomain's name ends with the containing domain's name. For example, A.B.C.D is a subdomain of B.C.D, C.D, D, and " ".
    • BIND 9 Administrator Reference Manual (9.3.2), Copyright © 2004, 2005 Internet Systems Consortium, Inc. ("ISC"), Copyright © 2000-2003 Internet Software Consortium, http://www.bind9.net/manual/bind/9.3.2/Bv9ARM.ch01.html
      Every name in the DNS tree is a domain, even if it is terminal, that is, has no subdomains. Every subdomain is a domain and every domain except the root is also a subdomain.
  3. (computing, Internet) An additional part prefaced to a domain name.
    • In en.wiktionary.org, en is a subdomain.

Translations

domain name prefaced with additional parts separated by a period
  • Icelandic: undirlén (is) n
  • Italian: sottodominio (it) m
  • Marathi: सब्डोमेन (mr) (sabḍomena)
  • Polish: subdomena (pl) f
  • Portuguese: subdomínio (pt) m
  • Spanish: subdominio (es) m

Usage notes

The technical community that created the terminology uses the first sense of a "domain name prefaced with additional parts".

Synonyms

See also

 

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More Definition Results for "Subdomain"
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'Subdomain' Information

The Domain Name System (DNS) has a tree structure or hierarchy, with each node on the tree being a domain name. A subdomain is a domain that is part of a larger domain; the only domain that is not also a subdomain is the root domain. For example, mail.example.com and calendar.example.com are subdomains of the example.com domain, which in turn is a subdomain of the com top-level domain (TLD). A "subdomain" expresses relative dependence, not absolute dependence: for example, wikipedia.org comprises a subdomain of the org domain, and en.wikipedia.org comprises a subdomain of the domain wikipedia.org. In theory, this subdivision can go down to 127 levels deep, and each DNS label can contain up to 63 characters, as long as the whole domain name does not exceed a total length of 255 characters. But in practice most domain registries limit at 253 characters.
from: Wikipedia: subdomain,
Sun Apr 14 05:18:49 2013
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