Delay Tolerant Networks (DTN) is the most growing interest in wireless multi-hop networking research community under sensor networks domain specifically in Mobile based sensor networks. DTN networks places various research challenges due to drastic mobility via mobile devices over each layer of the protocol stack and non-availability of entire path from source to destination. The important features of DTN network is selection of the best forwarding nodes and co-ordination among the nodes to deliver the packets to their destination in efficient manner.