This paper starts with an overview of vehicular ad hoc networks (VANETs) and their characteristics. Then this paper reviews diverse\napplications ofVANETs and the requirements of these applications. In addition it reviewsVANETs standards, different broadcasting\npresented in a variety of studies, and also associated issues with data dissemination in connected and fragmented vehicular networks\nto solve broadcast storm problem and temporary disconnected VANETs. The discussion will be about the encountered challenges\nand presented solutions with respect to the related issues, based on the literature and strength and weakness of each protocol.
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