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Traditionally, global network mobility problem is addressed at networking layer. However, none of these solution is designed for supporting seamless horizontal and vertical handover. The demonstrated solution, called WiOptiMo, provides always-on, continuous and optimized network services, whenever possible, to the applications independently from lower layers. The whole network can move and all network nodes can continue to work with the optimal connection, until some possible connection exists. This paper shows how the network mobility can be handled at application layer with WiOptiMo and presents a demonstration scenario with a mobile network, whose nodes access audio and video application without being affected by the fact that the network moves and switches from one network access to another.