Vehicular Ad-hoc Network (VANET) is the extended version of Mobile Ad-hoc Network (MANET). Both share similar characteristics except VANET is utilizing the vehicles instead of mobiles. However; the high speed of the vehicles, the rapidly change of VANET topology, and the city environment characteristics, has become today's issues in terms of wireless communication using vehicles. In terms of routing protocols, there are so many protocols that could be used by VANETs. However; these protocols are not capable enough to achieve the communication. Position-based or geographical-based routing is one of the examples that we will cover in this paper. Our main focus is to make comparison of geographical-based routing protocols. For example, qualitative comparison of protocols that are used for packages' carrying and forwarding such as some Delay Tolerant Network (DTN) and non-DTN geographic routing protocols. Finally, each protocol has its own advantages and disadvantages. So it is important to have an idea about them in order to guidance the researcher. Depends on this comparison it is observed that hybrid DTN and non-DTN will perform better since it will take the advantages of all DTN and non-DTN.
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