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Software Defined Networking (SDN) is a promising solution for addressing challenges of future networks. Despite its advantages such as flexibility, simplification and low costs, it has several drawbacks that are largely induced by the centralized control paradigm. Security is one of the most significant challenges related to centralization. In that regard, Distributed Denial of Service (DDoS) attacks...
In most existing cloud services, a centralized controller is used for resource management and coordination. However, such infrastructure is gradually not sufficient to meet the rapid growth of mega data centers. In recent literature, a new approach named devolved controller was proposed for scalability concern. This approach splits the whole network into several regions, each with one controller to...
Scalable network wide flow monitoring has remained a distant dream because of the strain it puts on network router resources. Recent proposals have advocated the use of coordinated sampling or host based flow monitoring to enable a scalable network wide monitoring service. As most hosts in data centers get virtualized with the emergence of the cloud, the hypervisor on a virtualized host adds another...
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