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(1) (Internet EXchange Processor) See IXA.

(2) (Internet eXchange Point) A public junction point on the Internet that provides an on-ramp to the Internet as well as a location for carriers to exchange traffic. As of 2007, there were approximately 300 IXPs around the world, with more than 75 in the U.S. For a current list of IXPs, visit www.pch.net/resources/data.

An IXP is physically some combination of switches and routers. The organization connects to the IXP from a port on its router to a port on the IXP's switch. The attachment is at the data link level (layer 2) and is typically Ethernet, but can also be ATM.

Public Peering
At these exchange points, major carriers accept traffic from each other and agree to carry the other's packets to their downstream destination point without charge. Peering arrangements are made with bilateral and multilateral agreements between the carriers.

If a carrier with less traffic wants to exchange packets, or a smaller, regional ISP needs an on-ramp to the Internet, a transit agreement is struck, wherein the backbone carrier charges the smaller operator a fee for transmitting its packets.

Private Peering
Major carriers also have private peering agreements between each other in locations where two or more carriers have switching points in close proximity. In late 1995, UUNET, MCI and GTE were the first to begin private arrangements. Thus, the Internet backbones are managed by a combination of public peering at the IXPs, also called "network access points" (see NAP) and private peering at their own locations. See Tier 1 network.
References in periodicals archive ?
Analogous with the role that international airports play in airline traffic, IXPs serve as critical hubs for data traffic exchange in the global Internet infrastructure.
Based on the test results, IIJ and NTT Com are also considering deployment of 100G Ethernet to cope with the growth in Internet traffic exchanged through the IXP.
Multiple Internet Service Providers can connect at a single IXP, creating the potential for a range of technical and economic benefits for the local internet community, he pointed out.
An IXP is a physical network infrastructure operated by a single entity with the purpose to facilitate the exchange of Internet traffic between Autonomous Systems.
The Open-IX Association is encouraging a more mutual and open model of Internet exchanges, and interconnection within data centers by issuing certification to IXPs and data centers who meet the standards set by the community.
France-IX intends to solve this issue by developing an infrastructure of its own and gathering the existing Parisian IXPs so it attracts both national and international exchanges.
While the IXP Subcommittee is focusing on open platform Internet Exchange Points that enable providers to interact and exchange content, The Data Center Subcommittee's charge is to create minimum standards for the design and operation of the facilities housing the Internet Exchange Points.
This IXP development is critical in areas such as Eastern Europe and Africa, where Exchanges foster local markets and enables digital inclusion.
Brocade IXP switching and routing solutions are one of the industry leaders in density, wire-speed performance at ultra-low latency, while consuming significantly less energy and dissipating less heat than comparable solutions.
This sale signifies the single largest purchase order secured by the Infrastructure Protection (IXP) business and adds further pace to the solid development of the IXP business in the Americas.
They can be manufactured in buns or continuous rolls, with or without the IXP - LCI Low Carbon Impact Technology.
The IXP will provide a direct interconnect between businesses in Germany and their customers or branches in Namibia, improving business.