1,721,006 research outputs found
Towards peer-to-peer traffic analysis using flows
No full textOne of the main problems with today's Internet traffic analysis is caused by the large number of network-based applications whose types and traffic patterns are more complicated than in the past. Today, peer-to-peer (P2P), streaming media, and game traffic are continuously increasing. The difficulty the traffic analysis is that this newly emerging traffic is not as simple as past well-known port based traffic. This paper focuses on analyzing P2P traffic, which is the most complicated traffic among newly emerging Internet traffic. We describe the properties of P2P traffic and explain why P2P traffic analysis is more difficult than other types of Internet traffic analysis. Next, we propose a new algorithm suitable for P2P traffic analysis. The main idea of our algorithm is that flow grouping based on their relationships will increase the accuracy of P2P traffic analysis.X117sciescopu
Characteristic analysis of internet traffic from the perspective of flows
No full textThe necessity of network traffic monitoring and analysis is growing dramatically with increasing network usage demands from individual users as well as business communities. Most network traffic monitoring and analysis systems are based on flows. One key asset with these systems is to compress a significant amount of packet data into flows. However. the compression ratio is highly variable in the recent network environments due to the increased use of peer-to-peer file sharing applications and the frequent appearances of abnormal traffic caused by Internet worms, which negatively influences the performance of traffic analysis systems. The performance of traffic monitoring and analysis systems highly depends on the number of flows as well as link utilization and the pattern of packet arrival. This paper examines the characteristics of recent Internet traffic from the perspective of flows. We found that the frequent occurrence of flash flows highly affects the performance of the existing flow-based traffic monitoring systems. Using various flow-related metrics. we analyzed the IP traffic traces collected from the Internet junction at POSTECH, a university with over 6000 end hosts and servers. (c) 2005 Elsevier B.V. All rights reserved.X1132sciescopu
Streaming media and multimedia conferencing traffic analysis using payload examination
No full textThis paper presents a method and architecture to analyze streaming media and multimedia conferencing traffic. Our method is based on detecting the transport protocol and port numbers that are dynamically assigned during the setup between communicating parties. We then apply such information to analyze traffic generated by the most popular streaming media and multimedia conferencing applications, namely, Windows Media, Real Networks, QuickTime, SIP and H.323. We also describe a prototype implementation of a traffic monitoring and analysis system that uses our method and architecture.X119sciescopuskc
XML-based network management for IP networks
No full textXML-based network management, which applies XML technologies to network management, has been proposed as an alternative to existing network management The use of XML in network management offers many advantages. However, most existing network devices are already embedded with simple network management protocol (SNMP) agents and managed by SNMP managers. For integrated network management, we present the architectures of an XML-based manager, an XML-based agent, and an XML/SNMP gateway for legacy SNMP agents. We describe our experience of developing an XML-based network management system (XNMS), XML-based agent, and an XML/SNMP gateway. We also verify the effectiveness of our XML-based agent and XML/SNMP gateway through performance tests. Our experience with developing XNMS and XML-based agents can be used as a guideline for development of XML-based management systems that fully take advantage of the strengths of XML technologies.X1116sciescopuskc
Design, Fabrication and Implementation of a Novel Microfluidic Platform for Investigation of Bacterial Cancer Targeting
No full textTOWARDS AUTONOMIC NETWORK MANAGEMENT FOR MOBILE IPV4 BASED WIRELESS NETWORKS
No full textThe rapid progress of wireless communication technologies has opened a possibility to offer various types of communications to users irrespective of their locations. The all-IP based wireless networks have been proposed and the Mobile IP protocol is considered as one of prominent candidate frameworks to support a seamless mobility of users. However, to our best knowledge, there are few research efforts to design and develop a network management system targeted for Mobile IP based wireless networks. In this paper, we introduce the concept of autonomic wireless network management which utilizes SNMP agents to manage more intelligently through the self-management functionality. We present a design of autonomic wireless network management system (AWNMS) and its prototype implementation. The currently implemented system is fully compliant with Mobile IP MIB and provides management functions such as network topology auto-discovery, mobility tracking function, etc. The implemented system is validated and examined in a Wireless LAN based test-bed network.110sciescopu
XML-based configuration management for IP network devices
No full textAs the Internet continues to grow, the tasks of operations and management of IP networks and systems are becoming more difficult. Over the past few years, much effort has been given to improve the deficiencies of SNMP, but most have failed to be standardized. One critical deficiency of SNMP is in the area of configuration management. Recent work focuses on the use of XML technology for network and service management as an alternative or complementary approach to SNMP. This article presents the IETF's latest effort, Netconf, which is viewed by many as a promising revolutionary solution for configuration management. To validate this new effort, we present the design and implementation of an XML-based configuration management system based on Netconf. We also discuss our experience with XCMS and make some suggestions for improving the current Netconf protocol.X1114sciescopu
Design and implementation of Web Services-based NGOSS technology-specific architecture
No full textTo cope with frequent changes and functional additions of operation and support systems (OSSs), a guideline of OSS's architecture and development methods is needed. TeleManagement Forum has provided Next Generation Operations Systems and Software (NGOSS) technology-neutral architecture (TNA), which describes major concepts and architectural details of the NGOSS architecture in a technologically neutral manner. The TNA can be mapped onto technology-specific architectures (TSAs) using specific technologies such as Extensible Markup Language, Java, and Common Object Request Broker Architecture. Web Service, a distributed and service-oriented computing technology, can be also applied to NGOSS TSA. In this paper, we provide a design and implementation of Web Services-based TSA in accordance with the architectural principles of TNA and the performance evaluation of our proposed system. Our work can be used as a guideline for anyone planning to develop a Web Services-based NGOSS TSA.X112sciescopu
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