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 TitleDate AddedCompany
whitepaper Target-Based TCP Timestamp Stream Reassembly2007-07-30 Sourcefire
  This paper explores the use of the TCP timestamp option and associated timestamp values to comprehend how different operating systems react to manipulated timestamp values. This is valuable knowledge for an Intrusion Detection System (IDS) or Intrusion Prevention System (IPS) to possess and implement to avoid evasions that employ TCP timestamp value mutations.

Tags: Network Security, Intrusion Detection Systems		   
whitepaper Visualizing the Limiting Factors for the Speed of TCP in Realtime2007-07-28 University of Twente
  This work presents methods that detect the limiting factors for the speed of TCP in realtime. The limiting factors under consideration are the receive window, network and application limitation. The similarities in functionality between these methods are grouped in a framework in this work. In addition, this work shows the implementation of the realtime detection methods in order to show in realtime the limiting factors for the speed of TCP streams using a graphical interface.   
whitepaper Werner Enterprises Sees Green Light for Growth in China2007-07-19 AT&T Knowledge Ventures
  Werner Enterprises, Inc. is a premier transportation and logistics company with coverage throughout the U.S., Canada, Mexico and China. The company has quickly expanded from over-the-road trucking within the U.S. into global logistics management. Successful in Canada and Mexico, Werner sees continued international growth - particularly in the fast growing market in China - as its next big opportunity. Eager to take advantage of changing regulations, the new Werner Global Logistics division needed to rapidly and reliably leverage its logistics expertise and the IT infrastructure. To support its global logistics management business, Werner uses an MPLS-based IP VPN solution that links its Shanghai operations center to its U.S. headquarters and data center.

Tags: VPNs, MPLS		   
whitepaper HTTP Transfer Latency Over SCTP and TCP in Slow Start Phase2007-07-17 Institute of Electrical and Electronics Engineers
  Current web applications use HTTP (Hyper Text Transfer Protocol) over TCP (Transmission Control Protocol) to retrieve objects over the Internet. SCTP (Stream Control Transmission Protocol) is a recently proposed transport protocol with very similar congestion control mechanisms as TCP, except the initial congestion window during the slow start phase. This paper presents an analytical model of object transfer latency during the slow start phase for HTTP over SCTP and compare with the latency of HTTP over TCP. Validation of the model using experimental results, show that the average object transfer latency for HTTP over SCTP during the slow start phase is less than that for HTTP over TCP by 11%.   
whitepaper A Simulation Study of Multi-Color Marking of TCP Aggregates2007-07-17 Tel Aviv University
  Service Level Agreements (SLAs) are contracts signed between a provider and a customer to govern the amount of traffic that will be serviced. This work pinpoints an important problem faced by the Internet Service Provider (ISP) which is to be able to differentiate between the services given to aggregates of multiple TCP connections. The Metro-Ethernet access network, the Differentiated Services (DiffServ) architecture and the ATM reference model are three architectural models where edge routers perform traffic metering and coloring of aggregated flows according to the SLA. Finer color marking was suggested to improve differentiation quality. The authors observed that increasing the number of colors indeed provides a good differentiation between the aggregates according to the committed and the excess rates.

Tags: SLA		   
whitepaper A Machine Learning Approach to TCP Throughput Prediction2007-07-16 Association for Computing Machinery
  TCP throughput prediction is an important capability in wide area overlay and multi-homed networks where multiple paths may exist between data sources and receivers. This paper describes a new, lightweight method for TCP throughput prediction that can generate accurate forecasts for a broad range of file sizes and path conditions. The author's method is based on Support Vector Regression modeling that uses a combination of prior file transfers and measurements of simple path properties. This paper calibrates and evaluates the capabilities of the throughput predictor in an extensive set of lab-based experiments where ground truth can be established for path properties using highly accurate passive measurements.   
whitepaper Application-Layer Multipath Data Transfer Via TCP: Schemes and Performance Tradeoffs2007-07-13 University of Massachusetts
  For applications involving data transmission from multiple sources, an important problem is: when sources are allowed to use multiple paths, how does one select paths and control the sending rates on the paths to maximize the aggregate sending rate of the sources? This problem is considered in the context of an overlay network by allowing a source to send data over k (k¡Ý1) overlay paths to its destination. This problem is NP-hard, and an iterative distributed heuristic developed to solve it. In each iteration, paths are first selected and then control the sending rates on the multiple paths to maximize the aggregate sending rate of the sources. For rate control, an application-level multipath rate controller is developed via TCP.   
whitepaper TCP/IP Overview2007-07-13 Cisco Systems
  The Internet Protocol suite includes not only lower-level specifications, such as Transmission Control Protocol (TCP) and Internet Protocol (IP), but specifications for such common applications as electronic mail, terminal emulation, and file transfer. The Internet protocols are the most widely implemented multivendor protocol suite in use today. Support for at least part of the Internet Protocol suite is available from virtually every computer vendor. This paper describes technical aspects of TCP, IP, related protocols, and the environments in which these protocols operate. Because the primary focus of this paper is routing (a layer 3 function), the discussion of TCP (a layer 4 protocol) will be relatively brief.   
whitepaper Distributed syslog architectures with syslog-ng Premium Edition2007-07-07 Balabit IT Security
  This paper discusses the advantages of using syslog-ng Premium Edition to implement distributed syslog architectures in heterogeneous environments. The document is recommended for technical experts and decision makers working on implementing centralized logging solutions, but anyone with basic networking knowledge can fully understand its contents. The procedures and concepts described here are applicable to version 2.1 of syslog-ng Premium Edition.

Tags: File and Network Servers, Anti-Hacking, Intrusion Detection Systems		   
whitepaper TCP-ROME: Performance and Fairness in Parallel Downloads for Web and Real Time Multimedia Streaming Applications2007-07-05 Deutsche Telekom
  Parallel download protocols that establish multiple TCP connections to distributed replica servers have the potential to reduce file download time and to improve the quality of realtime multimedia downloads. Unfortunately, parallel download protocols are also inherently unfair towards single-flow downloads. This paper presents TCP-ROME, a parallel download protocol that allows a dynamic mitigation of throughput and fairness. A receiver-based framework allows a dynamic adjustment of the congestion and rate control of each subconnection. TCP-ROME offers two usage modes: a binary mode where the congestion control of each subconnection can be switched between TCP-fair rates (high priority) and at a TCP-LP (low priority) fair rate and a more complex range mode where the aggregated throughput aims at meeting a specified target rate.

Tags: Streaming Media