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The main advantage of Mobile Ad-hoc NETworks is the absence of an infrastructure, typical of centralized networks, that makes them very scalable and adequate for highly-variable network topologies. In VANETs each node is a vehicle that needs to communicate with other vehicles or road-side units with the respect of some QoS constraints, strongly dependent on how the routing takes place in path minimization, on how protocol overhead affects the available bandwidth and on how different channels are selected in order to minimize interference levels.
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