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Software-defined networks (SDNs) offer network defenders the opportunity to choose from a variety of protection techniques in response to different threats. In contrast, traditional network architectures often lack the flexibility to implement threat-specific security controls. This research was conducted on a hardware SDN test bed running custom security applications to demonstrate techniques that...
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...
A flexible Wireless Sensor Network platform for easier implementation of diverse applications has been developed and deployed at one of the Institute Superior Tecnico - Technical University of Lisbon (IST-TUL) campus. Since its initial deployment in 2007, this test-bed has grown steadily, supporting new nodes, applications and experiments. However, some initial problems, which were solved on an ad...
The LHCb event building relies on a readout network based on Gigabit Ethernet (GbE). The readout network is extremely performance critical, sophisticated monitoring at all levels is essential for the successful operation of the data acquisition for the experiment. LHCb uses a commercial Supervisory Control and Data Acquisition (SCADA) system called PVSS II for its Experiment Control System (ECS),...
Controller Area Network (CAN), a serial communication protocol, is widely used in industry in embedded applications. The fixed priority arbitration mechanism in CAN results starvation of lower priority nodes because in the presence of a set of higher priority messages, the low priority nodes are restricted to appear on a CAN network. Since lower priority messages can not change their priorities so...
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