International Journal of Emerging Technology and Advanced Engineering (IJETAE)
In the recent days the delay-tolerant-network imposes many challenges in the area of VANET, so it has been taken as a serious issue among the researchers. DTN which is better to be known as delay tolerant or disruption tolerant networks which have that much of capability to interconnect the heterogeneous devices in a particular region. DTN is an approach of networking technique, addresses the limitations which are associated with the disconnected, disrupted networks, where the continuous network connectivity may not be presence in the heterogeneous networks. In this paper, the survey of various DTN techniques which have been introduced in the past are discussed briefly and the limitations and the challenges associated with the DTNs are elaborated here.