.arpa

The domain name arpa is a top-level domain (TLD) in the Domain Name System of the Internet. It is used exclusively for technical infrastructure purposes. While the name originally was the acronym for the Advanced Research Projects Agency (ARPA), the funding organization in the United States that developed one of the precursors of the Internet (ARPANET), it now stands for Address and Routing Parameter Area.

arpa also contains the domains for reverse domain name resolution in-addr.arpa and ip6.arpa for IPv4 and IPv6, respectively.

Types

As of 2015, IANA distinguishes the following groups of top-level domains:

History

The arpa top-level domain was the first domain installed in the Domain Name System (DNS). It was originally intended to be a temporary domain to facilitate the transition of the ARPANET host naming conventions and the host table distribution methods to the Domain Name System. The ARPANET was one of the predecessors to the Internet, established by the United States Department of Defense Advanced Research Projects Agency (DARPA). When the Domain Name System was introduced in 1985, ARPANET host names were initially converted to domain names by adding the arpa domain name label to the end of the existing host name, separated with a full stop (i.e., a period). Domain names of this form were subsequently rapidly phased out by replacing them with domain names under the newly introduced, categorized top-level domains.

ARPA

Arpa and ARPA may refer to:

Given name

Surname

Geographical names

Other uses

Arpa (river)

The Arpa (Armenian: Արփա, Azerbaijani: Arpaçay) is a river that flows through Armenia and Azerbaijan's Nakhichevan exclave. It originates in the Vayots Dzor province (marz) of Armenia and is as a left tributary of the Aras. It runs through many cities and towns and is mainly known for its beauty. Spandaryan Reservoir lies on the river.

Yeghegnadzor

The Noravank church and canyon, as well as the Areni wine region, are in the wrong direction, but quite worthwhile. Yeghegnadzor has a few monuments in the surrounding area, but some are harder to access. Boloraberd, Spitakavor, Mozrov Caves, and such are not so easily accessible. Outside Yeghegnadzor are the ruins of Glazdor University and the adjoining monastery. Around Vayk there are restaurants along the river which consist of terraces built on its bank set in beautiful surroundings. The Arpa valley continues south until a number of hairpin bends mark the steep ascent to the "Gates of Zangezur" monument, marking the highest point of the road, and start of the descent towards Sisian.