Forty-six full papers and 21 short papers from the September 2005 symposium present tools for modeling computer architectures and analyzing protocol performance, storage systems, network traffic, resource management, and wireless networks. The contributors propose a method for understanding how applications use TCP to exchange data, a traffic characterization procedure for multimedia applications in converged networks, an SCM-based adaptive clustering algorithm, and a geographic directed preferential internet topology model. Other topics include visualizing the capacity of a system with behavior uncertainties, dynamic replica placement in content delivery networks, and parallel logic simulation of million-gate VLSI circuits. No subject index is provided.