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Redundancy, diversity, and connectivity to achieve multilevel network resilience, survivability, and disruption tolerance

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<mark>Journal publication date</mark>05/2014
<mark>Journal</mark>Telecommunication Systems
Issue number1
Volume56
Number of pages15
Pages (from-to)17-31
Publication StatusPublished
Early online date9/05/14
<mark>Original language</mark>English

Abstract

Communication networks are constructed as a multilevel stack of infrastructure, protocols, and mechanisms: links and nodes, topology, routing paths, interconnected realms (ASs), end-to-end transport, and application interaction. The resilience of each one of these levels provides a foundation for the next level to achieve an overall goal of a resilient, survivable, disruption-tolerant, and dependable Future Internet. This paper concentrates on three critical resilience disciplines and the corresponding mechanisms to achieve multilevel resilience: redundancy for fault tolerance, diversity for survivability, and connectivity for disruption tolerance. Cross-layering and the mechanisms at each level are described, including richly connected topologies, multipath diverse routing, and disruption-tolerant end-to-end transport.