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What is Network Virtualization

Encyclopedia of Information Science and Technology, Fifth Edition
Abstracting network resources traditionally delivered in hardware to software. It can combine multiple physical networks to one virtual, software-based network, or it can divide one physical network into separate, independent virtual networks.
Published in Chapter:
Interoperability Provision of IoT Data Protocols on Top of Virtualized Infrastructure
Vaios Koumaras (INFOLYSIS P.C., Greece), Marianna Kapari (INFOLYSIS P.C., Greece), Angeliki Papaioannou (INFOLYSIS P.C., Greece), George Theodoropoulos (INFOLYSIS P.C., Greece), Ioannis Stergiou (INFOLYSIS P.C., Greece), Christos Sakkas (INFOLYSIS P.C., Greece), and Harilaos Koumaras (NCSR “Demokritos”, Greece)
Copyright: © 2021 |Pages: 15
DOI: 10.4018/978-1-7998-3479-3.ch064
This article focuses on IoT interoperability challenges that limit the applicability of IoT-related services due to the variety of IoT data protocols utilized by different sensors and data nodes. Through the agility brought by virtualization, which allows gateway functions to be deployed on demand in an agile manner, this chapter discusses the concept of interoperability provision over heterogeneous IoT data protocols. More specifically, this chapter discusses the problem of interoperability in IoT domains by introducing the most popular IoT data protocols that are commonly used today. Then, a proposed solution is described based on the agility offered by virtualized infrastructures with SDN/NFV capabilities. The basic functionalities of these technologies are briefly presented and finally a proposed approach towards the deployment on-demand of date protocol GWs is described.
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Challenges of 5G Networking in Access and Core Networks
The process of uniting hardware (and software) network resources and network functionalities into isolated, software-based administrative entities that allows the creation of virtual networks on top of the (shared) physical network infrastructure.
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Cloud Computing: A Security and Defense Proposal
Computer network elements such as switches, routers, and firewalls virtualized in cloud.
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Abstraction and Control of Transport Networks
Network virtualization refers to allowing the customers to utilize certain network resources as if they own them and thus allows them to control their allocated resources in a way most optimal with higher layer or application processes. This customer control facilitates the introduction of new applications (on top of available services) as the customers are given programmable interfaces to create, modify, and delete their virtual network services.
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