Introduction
Technological aspects
Alternative solutions
Business models
Products in the market
Future evolutions
Conclusions
References
Copyright © 2012 Nazariy Kayda №74413
Typical architectureProtocolsCodecsPeer-to-peer VoIP

Peer-to-peer VoIP

Services P2P VoIP (Voice over TCP / IP-based peer to peer technology), such as popular today, Skype, are becoming more widely used.

Peer technology (P2P) first appeared and gained popularity in projects such as Napster and KaZaA, where users get the ability to share applications, search and download files. Decentralized peer networks have several advantages over traditional networks, "client-server", because they can expand indefinitely, without the need for costly centralized resources. Instead, they use the network performance and capacity of end users, since these resources are increasing in direct proportion to the growth of the network itself.

IP-telephony, or VoIP (Voice over Internet Protocol), there is not the first year, but has some limitations that do not allow it until recently more widely available in mass market consumer services, technology displacing traditional telephony services. These constraints can be significantly weakened or even completely removed when using P2P concepts in IP-telephony. A striking example of successful application of a technology Skype, which is known to-peer file sharing, based on a peer network of users who perform the role of voluntary routing messages. Skype, in contrast to the centralized services offered, for example, Net2Phone, does not require for normal operation of a strong infrastructure base that is causing the bandwidth.