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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. There are approximately 300 IXPs around the world, with more than 100 in the U.S.

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 ?
The project will be implemented in phases — the first will be training and setting up of national IXPs, while the second phase, which is expected to start in 2013, will focus on setting up of regional IXPs," said Dawit Bekele, ISOC regional bureau director for Africa.
The IXP series offers premium 4-inch thick fiberglass sliding doors with high impact composite reinforced impactable panels on both sides of the door.
This should be enough to at least match early IXP iterations in terms of bandwidth, while the complementary IBM Network Processor will match its 10 embedded and C programmable RISC "pico processors" against the six RISC cores of the IXP.
One of the world's largest IXPs with headquarters in Moscow, MSK-IX provides neutral connectivity services to over 500 organizations, including international companies operating in Russia.
The country has eight major ISPs peering at the Malawi IXP but the policy was that only members could see the amount of traffic and activity.
Enea Group's OSE Systems subsidiary has ported its OSE real-time operating system to Intel's IXP 1200 network processor to offer customers an end-to-end system for the creation of distributed networking applications.
It will typically invest between $1m and $5m in start-up companies and companies working on products based on the IXP products.
Internet Society report demonstrates the significant cost and performance gains in Kenya and Nigeria with IXP development
It is expected that this IXP will become the second most important Point of Interconnection in the country, just behind SAaAaAeALo Paulo IX
Yyotta will provide its IXP, network transport and managed service solutions via its iFortress modular datacenter, a facility used by U.
The biggest loss suffered by the Oil and Gas IXP that shed 9.
The compiler is designed to allow programmers to quickly write programs for Intel's IXP 1200 network processor line and to be able to reuse the code with future generations of the processors.