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A common point at which different [[Autonomous System|autonomous systems]] exchange routing information about, and transfer packe

[[Multihoming]] to one or more other [[autonomous system]]s, based on reachability information transmitted via the Border Gateway Pr

...ternet Protocol]] address allocations to large organizations, as well as [[Autonomous System]] numbers; it also has educational and policy development roles

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...ally used in [[intranet]]s and [[extranet]]s, where a prefix other than an autonomous system number is used to disambiguate</ref> ...indicating it is a "well-known" community, or contains the value of the [[autonomous system]] that defines the meaning of the second field.

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...fault route]]s can be part of the domain. For communications to external [[Autonomous System]]s, the Border Gateway Protocol (BGP) can accept and advertise [[external r It is possible that an [[Autonomous System]] (AS) will contain only one routing domain, but it certainly can have mult

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...[Domain Name Service]], and other highly specialized identifiers such as [[autonomous system]] numbers, as well as identifiers specific to [[protocol (computer)]] famil ==Addresses and autonomous system numbers==

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...e does not need to join ARIN before applying for [[IPv4]] address space, [[Autonomous System]] numbers, or IPv6 address space. If an organization does obtain addresses

...provide a significant amount of information about the various points and [[autonomous system]]s a route traverses, perhaps information on the [[acceptable use policy]] ...ed a ''routing domain''. More than one routing domain may coexist in an [[autonomous system]], which is a set of routers and addresses, under one or more administrativ

To take a BGP-oriented example, assume you are in [[Autonomous System]] 1 (AS1). You import route advertisements from other As, which, minimally,

...que for interconnecting Border Gateway Protocol (BGP) routers, inside an [[autonomous system]], to improve scalability. One of the major scalability problems of BGP run ...clusters, or even hierarchies of clusters, inside confederation-specific [[autonomous system]]s.

...ples used in developing [[routing policy]]. When a [[routing domain]] or [[autonomous system]] receives a packet, under hot potato, it gets rid of it as quickly as poss ...tato, also called best exit routing, involves having the routing domain or autonomous system keep control of the packet as long as it can route it over links of known p

or sometimes of a single [[autonomous system]].

...ions, can exchange traffic for one anothers' customers. In this context, [[autonomous system]]s that exchange reachability information for their own customers are calle

...s a means of describing abstract [[routing policy|routing policy]] among [[autonomous system]]s (AS), the basic building block of global Internet routing. It allows bot *aut-num class: autonomous system

...r Gateway Protocol (BGP). ISPs that run BGP will normally have their own [[Autonomous System]] number.

Networks of routers and links are organized into [[Autonomous System | Autonomous Systems]]. As with routers, however, it is much simpler to th

Networks of routers and links are organized into [[Autonomous System | Autonomous Systems]]. As with routers, however, it is much simpler to th

..., all of which require that there be an exchange of information from the [[autonomous system]]s being multihomed, to one or more other AS. In this discussion, the AS th

| Cannot have autonomous system border router (ASBR) or be traversed by virtual link. Accepts all inter-are | May have autonomous system border router (ASBR). Cannot have virtual link. Accepts all inter-area link

*[[Autonomous System/Definition]]

...through [[routing policy|routing policies]], specifically of the ISPs as [[Autonomous System]]s (AS) exchanging routing information through the Border Gateway Protocol

...et Protocol version 6]] (IPv6). Internally, the Internet is divided into [[Autonomous System]]s, which exchange information about the destinations they can reach, using