5 Future of Internet
5.3 Redesign of Internet Technologies

As already mentioned, a number of connected devices to the Internet tends to constant and unstoppable growth, year after year disproportionately multiplied.

To obtain a stable, safe, flexible and agile network, we can no longer remain in the standards of the sixties and seventies, while it is forced to move forward and open doors to new technologies. As the most challenging seems to be interconnection of programmable - software defined networks and virtualization of network services. Such newly created architecture promises not only a connection the indisputable advantages of both technologies, but also the emergence of new improvements.

The breakthrough idea is certainly architecture for the automated provisioning of network services in virtualized form. Software defined networks can create the perfect automated network environment that automatically configures the network in the enterprise as well as the customer's environment. Moreover, the applications on top of the SDN Controller will be able to dynamically generate and evaluate network quality and if necessary change the network path so that the parameters of the network are retained, but also to intervene in case of failure of a particular network line.

In the context of automation, we can also reflect on specific templates, or policies for specific virtualized services, but also pointed tailored policies for the specific client. Through software driven approach we are able to maintain the desired configuration across a number of network services which are even consistent - this will avoid inconsistency which may arise from human factor.

The biggest challenge is the centralization and transfer of own services, so called “travel with my network services”. That services are no longer in a physical form of large, heavy and hard to portable devices, each client is able to travel with their services, configured network worldwide without the need to transfer something physically.

Thanks to flexibility of these future networks it is much better to monitor and adjust product on offer - a service as well as offering new enhancements, which has not yet been possible for a dedicated purpose-built appliances.

All these ideas are worded tempting, but deployment of the architecture interconnecting SDN and NFV technologies require replacement of existing outdated infrastructure, which is not so simple. As the possible transition can be integration and testing architecture SDN and NFV in the existing environment and the subsequent replacement of outdated technologies.

Software defined networking is a new approach which should enable us to manage, change and control the network dynamically through well defined interfaces. The centralized control embeds all the intelligence and maintains a network-wide view of the data path elements and links that connect them. This centralized up-to-date view makes the controller suitable to perform network management functions while allowing easy modifications to the networking functions through the centralized control plane. SDN makes it possible to manage the entire network through an intelligent orchestration and provisioning system that enables on-demand resource allocation.

Basic assumptions of the new network architecture [22]:

In this section, some basic ideas about Future Internet were presented.

Currently, there are many projects running concurrently and working to create a clean slate Internet concept. This research is still in its infancy so it is hard to talk about it and introduce the exact network architecture, trends etc. Many researchers are working on it and every research group talks about it from its point of view. But one thing is clear. Because the current Internet based on the IP is here over 40 years, we are already facing its limitations. Clean slate Internet concept will be very important and its deployment is only a matter of time.