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 TitleDate AddedCompany
whitepaper U.S. Olympic Training Centers: High-Speed Networking Aids the Quest for Gold2007-10-30 AT&T Knowledge Ventures
  The Olympic Training Centers need to create a rich development environment for the athletes training in hopes of making the U.S. Olympic Team or U.S. Paralympic Team, offering all the resources, facilities and support athletes require to reach the highest levels of performance in national, international and Olympic/Paralympic events. The OTCs wanted to take advantage of the latest training, coaching and conditioning techniques that increasingly rely on more sophisticated technologies and communications. OTC deployed AT&T with which their three Olympic Training Centers are now powered by a high-capacity IP virtual private network designed expressly for the unique training environment in each location.

Tags: VPNs		   
whitepaper On Optimal Probing for Delay and Loss Measurement2007-10-26 Association for Computing Machinery
  Packet delay and loss are two fundamental measures of performance. Using active probing to measure delay and loss typically involves sending Poisson probes, on the basis of the PASTA property (Poisson Arrivals See Time Averages), which ensures that Poisson probing yields unbiased estimates. Recent work, however, has questioned the utility of PASTA for probing and shown that, for delay measurements, a wide variety of processes other than Poisson can be used to probe with zero bias and Poisson probing does not necessarily minimize the variance of delay estimates. This paper, determines optimal probing processes that minimize the mean-square error of measurement estimates for both delay and loss.   
whitepaper Joint Uplink and Downlink Capacity Considerations in Admission Control in Multiservice CDMA/HSDPA Systems2007-10-25 Institute for Computer Sciences, Social-Informatics and Telecommunications Engineering
  TCP-based data flows generate packets and ACKs in two directions, be it in the wireline or wireless networks. In the latter case, packets are typically found in the downlink whereas ACKs are in the uplink. Those two links are asymmetric in the case of CDMA-based High Data Rate (HDR)/High-Speed Downlink Packet Access (HSDPA) systems, the uplink being much slower than the downlink and thus, in some cases, restrictive in terms of the achievable throughput of the TCP flow. The aim of this work is to evaluate the performance of such a setting, in the presence of both streaming and elastic traffic, under a dynamic scenario where users arrive to the system and leave it after completion of their service.

Tags: Mobile - Wireless Communications, TDMA - CDMA		   
whitepaper A Uni?ed Framework for Modeling TCP-Vegas, TCP-SACK, and TCP-Reno2007-10-22 Institute of Electrical and Electronics Engineers
  This paper presents a general analytical framework for the modeling and analysis of TCP variations. The framework allows the modeling of multiple variations of TCP, including TCP-Vegas, TCP-SACK, and TCP-Reno, under general network situations. In particular, the framework allows us to propose the first analytical model of TCP-Vegas for arbitrary on-off traffic that is able to predict the operating point of the network. The analysis provided by this framework leads to many interesting observations with respect to both the behavior of bottleneck links that are shared by TCP sources and the effectiveness of the design decisions in TCP-SACK and TCP-Vegas.

Tags: IP Technologies		   
whitepaper Despite the Risks, FTP Use on the Rise in the Enterprise2007-10-07 Sterling Commerce
  Global businesses require the free-flowing movement of information-from sensitive customer data to logistical process information-to thrive. No one piece of technology takes more heat for creating catastrophic business process crashes than File Transfer Protocol, or FTP.

Hilty Moore & Associates conducted a survey of IT managers and CIOs at 100 companies spanning the financial services, healthcare, retail, manufacturing and governmental business sectors to determine usage and requirements for FTP. Empirical and anecdotal information garnered from the survey revealed:
  • FTP unreliability is impacting the bottom line via transmission problems that result in missed SLAs, brand integrity impacts and customer confidence erosion due to breaches.
  • Participant comments reflect an incorrect, and potentially painful, belief that encrypting data transfers via FTP is a viable data security solution.
This survey report:
  • Highlights broad industry-level challenges with and current usage volume of FTP.
  • Suggests a shift in approach on the issue of organizational risk away from solely a data lockdown initiative to one that provides complete data security and actual, bottom-line financial value to a business.
  • Offers a way to address knowledge management more holistically with complete transfer visibility, business process and partner scalability, and a managed solution that secures data completely.


Tags: SLA, Knowledge and Data Management, Data Recovery - Security, IT Reliability		   
whitepaper Inventing the Internet and the Web0000-00-00 SlideShare
  This presentation explains how to invent the Internet and the Web.

Tags: IP Technologies		   
whitepaper TechNet Webcast: Windows Vista and Windows Server 2008 Branch Office Technology (Level 300)0000-00-00 Microsoft
  This webcast talks about the Next Generation TCP/IP Stack in the Windows Vista and Windows Server 2008 operating systems. The Next Generation TCP/IP Stack is a complete redesign of TCP/IP functionality for both Internet Protocol version 4 (IPv4) and Internet Protocol version 6 (IPv6) that meets the connectivity and performance needs of today's varied networking environments and technologies. It also examines the many security, performance, and scalability improvements that the Next Generation IT Stack introduces, and it discusses how user can prepare network for IPv6.

Tags: Application Servers, Windows Vista, Windows Server 2008		   
whitepaper Cisco Proxy Mobile IP Configuration Notes With Cisco Access Point2007-10-01 Cisco Systems
  This paper provides a Proxy Mobile IP (PMIP) configuration example on an AP1200, using a Cisco ACS to retrieve Security Associations (SA) for a mobile device. The paper focuses on the SA retrieving aspect of PMIP configurations. In order to enable a PMIP AP to use a Cisco ACS server to retrieve SAs from the mobile node, the user must complete three main configurations tasks. First user must configure Cisco ACS information on an access point enabled with PMIP, second user should configure an AP enabled with a PMIP as an AAA Client on a ACS server and third is to configure mobile nodes' SA on a ACS server.   
whitepaper Real Stateful TCP Packet Filtering in IP Filter2007-09-26 Administration and Network Engineering
  IP Filter is an Open Source packet filtering engine that is available for a number of operating systems, including Solaris and FreeBSD, Open-BSD and NetBSD. IP Filter comes with so-called stateful packet filtering. In the case of TCP, the state engine not only inspects the presence of ACK flags, or looks at source and destination ports, but it includes sequence numbers and window sizes in its decision to pass or block packets. This greatly reduces the window of opportunity for malicious packets to be passed through the packet filter, even in the case when source and destination ports and addresses are known.   
whitepaper Enhancing TCP Over HSDPA by Cross-Layer Signalling2007-09-24 University of California
  A comprehensive performance evaluation of a cross-layer solution to increase users' downlink data rates over HSDPA is provided. The solution consists of a proxy entity between a server and the Radio Network Controller, and cross-layer signaling from the base station to the proxy. The performance of the solution is evaluated though a detailed ns-2 simulator environment, which includes all HSDPA features, as well as some existing TCP enhancing protocols widely adopted for internet traffic over wireless links. Numerical results show that the proxy significantly increases the users' throughput, while also improving the utilization of the radio resources.