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Network Function Virtualization (NFV) enables flexible implementation and provisioning of network functions as virtual machines running on commodity servers. Due to the availability of multiple hosting servers, such network functions (also called Virtual Network Functions (VNFs)) can be placed where they are actually needed, dynamically migrated, duplicated, or deleted according to the current network...
Restoration in transport networks is typically facilitated using reactive techniques at different layers, namely optical and IP restoration [1]. Optical restoration involves re-routing an existing optical connection (i.e., a lightpath) around a failure (e.g. link, amplifier, switch and transponder failures) in the optical layer. This strategy is efficient in terms of resource utilization, as backup...
Software-Defined Networking (SDN) is bringing DevOps [1] capabilities to current networks, reducing the time-to-market for new services and thereby providing a strong incentive for adoption to Service Providers and Network Operators. However, the current SDN landscape is extremely fragmented, so that different open and closed source controller frameworks such as OpenDaylight [2], Ryu [3], Floodlight...
The Software-Defined Networking (SDN) paradigm allows networking hardware to be made “malleable” and remotely manageable by the so-called SDN controllers. However, the current SDN landscape is extremely fragmented. Different open and closed source controller frameworks such as Open-Daylight [1], Ryu [2], Floodlight [3], etc. exist. Porting SDN applications from one such platform to another is practically...
OFELIA is an experimental network designed to offer a diverse OpenFlow-enabled infrastructure to allow Software Defined Networking (SDN) experimentation. OFELIA is currently composed of ten sub???testbeds (called islands), most of them in Europe and one in Brazil. An experimenter get access to a so-called slice; a subset of the testbed resources like nodes and links, including the Openflow programmable...
While sharing some commonalities with a canonical computer network, Wireless Sensor Network (WSN) presents many aspects which are unique. Security mechanisms in a WSN are mainly devoted to protect both the resources from attacks and misbehavior of nodes and the information transferred throughout the network itself. While the vast majority of the works on security for WSN in literature are focusing...
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