cost associated with control message exchanges and the overhead of layer-2 protocols, which can not be simulated in the and other popular DTN simulators. With this in mind, our reference point is the performance of the same protocol in the simulator. We note that this comparison would be impossible without support for segmenting messages into multiple packets, due to the use of relatively large messages as the base unit of transmission in the and other DTN simulators. We compare the protocols using three different mobility scenarios, all of which are run in the , which outputs and ns-2 mobility trace which in turn is input to ns-3. In this way, while there is still randomness in the mobility, there is no difference in the mobility of the nodes between the two simulators. Each parameter set is run 10 times with different seeds for the random number generator. The Helsinki mobility scenario is an urban environment, which is the default scenario for the simulator and hence appears commonly in DTN simulation literature. Bold Alligator is our interpretation of a US Marine Corps exercise, and Omaha is our interpretation of the historic amphibious assault at Omaha Beach during World War II. While 