Network World has an article on the evolution of IP-based networks that notes there are divergent views among standards bodies such as the ITU and the IETF, on the future evolution of the internet.
"The current Internet model is the stupid network model, where the network doesn't know what applications you're running and doesn't try to be helpful," he says. "The ITU's model [is] where the network is application-aware and can provide specific extra support for a particular application, such as VoIP. That session will compare what their strengths and weaknesses are, and hopefully out of it we can get some idea of what the future is going to look like."
Bradner says the ITU's model is designed to provide defined and guaranteed QoS, while the Internet is a best-effort model based on bandwidth capacity. He says both are applicable given the network circumstances - if there's plenty of bandwidth, there's no need for QoS controls; if not, there is.
The future of the 'Net could be shaped in large part by the need to support peer-to-peer applications and Web-based services, which use peer-to-peer protocols. This type of traffic is growing in use and importance in enterprise networks and on the 'Net, especially as companies move to SOAs designed to support peer-to-peer and message-based transmissions.
Are we heading for a future of dumb or smart networks? This recent piece in BCR Magazine on Making Networks Smart suggests that industry players on both the network side (e.g., Cisco and Juniper) and applications side (e.g., Microsoft, IBM, Sun, BEA) are making moves in the latter direction. Initiatives like the IPSphere Forum suggest that both the equipment manufacturers and the major service providers are on the same strategy:
The goal of the IPsphere forum is to create an industry call to action to create public networks that combine the reach of the Internet with the assured performance and security of a private network. This new approach is designed to overcome the current limitations of the Internet through the creation of "IPspheres," delivering an enriched experience for consumers, business-critical performance, and opening new markets for service providers.