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Internet Protocol version 6. Refers to the version of Internet protocol that supports 128-bit IP addresses. This protocol is not yet widely deployed, but allows for orders-of-magnitude more IP addresses than the more common IPv4 protocol.

The new generation Internet Protocol version designated as the successor to IPv4, the first implementation used in the Internet and still in dominant use currently.

Internet Protocol version 4. Refers to the version of Internet protocol that supports 32-bit IP addresses. This allows for approximately 4 billion unique IP addresses, which is not enough to cope with projected Internet demand in the next 5-10 years. Therefore, a new protocol called IPv6 has been developed that increases the number of possible IP addresses substantially.

The US National Research and Education Network, analogous to the European NRENs. See also GEANT.

The Internet Society - Bulgaria is a non­governmental organization, involved in a number of projects, related to the usage and promotion of free and open source software.

IPTV delivers digital TV over a broadband connection. Instead of a bouquet of broadcast services for direct viewing via aTV tuner, IPTV allows viewers to request a specific service from the server. The service is then streamed for viewing via the internet protocol and other technologies known as Digital Subscriber Line (DSL).

The Internet Governance Forum is a multi­stakeholder forum for policy dialogue on issues of Internjet governance. The mandate for the IGF is contained in the 2005 WSIS Tunis Agenda.

An Internet Exchange Point is a networking tool that enables the connection of more than two independent autonomous systems primarily to facilitate the exchange of Internet traffic. Via Internet Exchange Point is performed the connection only of autonomous systems . The connecton through the IXP does not require that the traffic passing through any of the two autonomous systems involved passes through a third autonomous system, nor does it modify or affect this traffic in any other way.

Source:Cyber Security Act

The function of an internet exchange point (IXP) is to interconnect networks. An IXP does not provide network access or act as a transit provider or carrier. Nor does an IXP provide other services unrelated to interconnection, although this does not preclude an IXP operator from providing unrelated services. An IXP exists to interconnect networks that are technically and organisationally separate. The term ‘autonomous system' is used to describe a technically stand­alone network.

Source: Directive (EU) 2016/1148 on measures to achieve a high level of security of networks and information systems in the Union

An IXP is a place where multiple Internet Service Providers (ISPs) interconnect their respective networks. IXPs are described as an institutional setting for the exchange of traffic where ISPs can voluntarily participate and where they agree to interconnect at a multilateral peering point to exchange their traffic without needing to buy transit from an upstream provider and thus reducing costs as there are usually no payments for the exchange of traffic.

Source: : An Assessment of IP interconnection in the context of Net Neutrality, BEREC Report of 6 December 2012, BoR (12) 130, p. 26.

The European Internet Exchange Association (Euro-IX) has defined an IXP as a “physical network infrastructure operated by a single entity with the purpose to facilitate the exchange of Internet traffic between Autonomous Systems.”

An ITU-based treaty that governs international telecommunications traffic (i.e. traffic between ITU members). N.B. there are two versions of this Treaty in force - the 1988 Treaty (applied by EU members) and the 2012 version applied by some 80-90 of the ITU's 193 members.