D'Souza, R.J.Varaprasad, G.Jose, J.Manoj, R.2020-03-302020-03-302010Proc. of the IADIS Int. Confs. - Informatics 2010, Wireless Applications and Computing 2010, Telecommunications, Networks and Systems 2010, Part of the MCCSIS 2010, 2010, Vol., , pp.239-242https://idr.nitk.ac.in/handle/123456789/8476A Delay Tolerant Network (DTN) is a subset of Mobile Ad Hoc Networks (MANET), where contemporaneous connectivity among all nodes doesn't exist. Making appropriate routing decision in such networks is a challenge. Researchers have addressed this issue for over a decade and have come out with several algorithms. The latest trend in this field is to utilize the power of handheld devices for transferring messages in a delay tolerant fashion. The goal of this work is to survey the evolution of various routing protocols in a DTN. � 2010 IADIS.Book chapter