ARPA
arpa
.arpa is an
Internet top-level domain (TLD) used exclusively for Internet-infrastructure purposes. It does not function as a normal TLD where websites are registered, but rather as a meta-TLD used to look up addresses, and for other purposes.The .arpa TLD was originally intended to be a temporary measure to facilitate the transition to the
Domain Name System. The
ARPANET was the predecessor to the Internet established by the
United States Department of Defense Advanced Research Projects Agency (ARPA), and when the Domain Name System was introduced in
1985, ARPANET host names were initially converted to domain names by adding .arpa to the end. Hostnames in other networks were also sometimes converted to pseudo-domain-style addresses by adding endings such as
.uucp and
.bitnet, though these were never added to the Internet root as formal TLDs. Domain names of this form were rapidly phased out by replacing them with domain names using the other, more informative, TLDs.
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ARPA
Arpa
arpa
ARPA
ARPA bezeichnet:Advanced Research Projects Agency, US-amerikanische Forschungsbehörde, die in
DARPA umbenannt wurdedas Advanced Research Projects Agency Network, siehe
ARPANETAutomatic Radar Plotting Aid, eine automatische Radar-Anlage; siehe
ARPA-AnlageAverage Revenue Per Advertiser, durchschnittlicher Erlös pro Anzeigenkunde
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Top-Level-Domain
Jeder Name einer
Domain im
Internet besteht aus einer Folge von durch Punkte getrennten Zeichen. Die Bezeichnung Top-Level-Domain (vom englischen top level domain, übersetzt Bereich oberster Ebene; Abkürzung TLD) bezeichnet dabei den letzten Namen dieser Folge und stellt die höchste Ebene der
Namensauflösung dar. Ist der vollständige Domain-Name eines Rechners bzw. einer Website beispielsweise de.wikipedia.org, so entspricht das rechte Glied (org) der Top-Level-Domain dieses Namens.
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ARPA
arpa
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Wikipedia® i posiada on Powszechna
Licencje Publiczna GNU
Arpa
arpa
.arpa è l'unico
dominio di primo livello generico con scopi infrastrutturali. È stato introdotto nel 1985, attualmente il registro è tenuto dalla
IANA.In origine era stato creato temporaneamente per la transizione dalla rete
ARPAnet al sistema
DNS, come gli attuali pseudo-domini
.uucp o
.bitnet. Tuttavia la cancellazione del dominio è impossibile in quanto è utilizzato nella risoluzione inversa DNS, ovvero ottenere il nome del dominio di un
indirizzo IP, tramite l'indirizzo speciale in-addr.arpa.
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