European Concerted Research Action COST 285 Action Objectives and the Symposium.- A Review of High Performance Simulation Tools and Modeling Concepts.- Using Visualization Techniques in Multilayer Traffic Modeling.- A Multilevel Approach for the Modelling of Large TCP/IP Networks.- Cross-Layer Interaction in Wireless Ad Hoc Networks: A Practical Example.- Multilayer Description of Large Scale Communication Networks.- Modelling and Simulation Study of TCP Performance with Link Layer Retransmission and Fragmentation for Satellite-UMTS Networks.- The Design of a FPGA-Based Traffic Light Control System: From Theory to Implementation.- Distributed Multihop Clustering Approach for Wireless Sensor Networks.- Scenario Simulation for Network-Centric Technology Assessment.- Verification and Validation of Simulation Models and Applications: A Methodological Approach.- Extending OPNET Modeler with External Pseudo Random Number Generators and Statistical Evaluation by the Limited Relative Error Algorithm.- Towards Flexible, Reliable, High Throughput Parallel Discrete Event Simulations.- Design and Performance Evaluation of a Packet-Switching Satellite Emulator.- Simulation Techniques for Peer-to-Peer Information Sharing Networks.- Repair Strategies on the Operation of MPLS Routing.- Incorporating Uncertainties into Traffic Simulators.- Effects of Bursty and Correlated Traffic on the Performance of Active Queue Management Schemes.- Quality-of-Service Analysis of Priority Queueing Systems under Long-Range Dependent and Short-Range Dependent Traffic.- Redimensioning Network Resources Based on Users' Behavior.- Internet Tomography in Support of Internet and Network Simulation and Emulation Modelling.- Emerging Requirements for Telecommunication Product Design and System Modeling.- A Tool for Packaging and Exchanging Simulation Results.