Structures of Molecules and of Molecular Systems of Informatics -- Entanglement in General Multipartite Quantum Systems and Its Role in Quantum Information Processing Tasks -- GPGPU Based Simulations for One and Two Dimensional Quantum Walks -- Negative Difference Resistance and Its Application to Construct Boolean Logic Circuits -- Improved Estimation of Success Probability of the Shor’s Algorithm -- FPGA Based “Intelligent Tap” Device for Real-Time Ethernet Network Monitoring -- Throughput Upper Limit for IEEE 802.11 Networks with Block Acknowledge and Frame Aggregation -- OPC UA Based Solutions for Integrated Operations -- Cloud Service Solving N-Body Problem Based on Windows Azure Platform -- An Experimental Wireless Mesh Network Node Based on AVR ATmega16 Microcontroller and RFM12B Radio Module -- The Cost of Redundancy in Distributed Real-Time Systems in Steady State -- Fuzzy-Neural Controller in Service Requests Distribution Broker for SOA-Based Systems -- Linking Simulation with Formal Verification and Modeling of Wireless Sensor Network in TLA+ -- Interpretation of Dual Peak Time Signal Measured in Network Systems -- Evaluation of IP Transmission Jitter Estimators Using One-Way Active Measurement Protocol (OWAMP) -- QoS Predictability of Internet Services -- Instruction Prediction in Microprocessor Unit Based on Power Supply Line -- Data Integration in Computer Distributed Systems -- Load Balancing for Heterogeneous Web Servers -- A Choice of Optimal Packet Dropping Function for Active Queue Management -- A Contribution to the Fair Scheduling for the TCP and UDP Streams -- Mobile Console for a Server of MBean Components -- Using Cloud Storage in Production Monitoring Systems -- Speech Processing Application Based on Phonetics and Phonology of the Polish Language -- Distant Analysis of the GENEPI-ENTB Databank – System Overview -- Monitoring Malware Activity on the LAN Network -- Using Mobile Devices for User Authentication -- SPOT: Optimization Tool for Network Adaptable Security -- On Authentication Method Impact upon Data Sampling Delay in Wireless Sensor Networks -- Company’s Data Security – Case Study -- Pessimistic Useful Efficiency of EPL Network Cycle -- Spanning Tree Protocol in Wireless Industrial Communication System -- OPC Data Acquisition Server for CPDev Engineering Environment -- Analysis of Parallel Iterative Solving Methods for Markovian Models of Call-Centers -- New Simplified HEED Algorithm for Wireless Sensor Networks -- Comparison of MPI Benchmarks for Different Ethernet Connection Bandwidths in a Computer Cluster -- Blind Signatures in Electronic Voting Systems.

This book constitutes the refereed proceedings of the 17th Conference on Computer Networks, CN 2009, held in Ustro\'{n}, Poland, in June 2010. The 37 revised full papers presented were carefully reviewed and selected for inclusion in the book. The papers are organized in the following groups: new technologies applied in computer networks, particularly those related to nano, molecular and quantum technology; new standard technologies related to computer network structure; the fundamentals of computer networks, their architecture and programming; articles concerning the Internet in its broad meaning; papers related to data security in distributed systems; and a group of articles describing industrial computer networks; and papers on applications.