Example of routing protocols in delay tolerant networks

This paper is an extension of [7], which represents an overview of DTNs (Delay Tolerant Networks). The introduction of this article comes with a global view over this type of networks. The literature review section identifies some challenges that this type of network meets and one of the most important evaluation criteria for a DTN. This work comes with a new section which brings some examples of DTN routing algorithms that were introduced and presented in different papers. The personal remarks section contains some ideas about the routing algorithms and their performances in DTNs.