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Title Date Added Company

Cross-Layer Analysis of TCP Performance in a 4G System 2007-08-31 Karlstad University

This paper presents results from an experimental study of TCP in a wireless 4G evaluation system. Test-bed results on transport layer performance are presented and analyzed in relation to several link layer aspects. The aspects investigated are the impact of channel prediction errors, channel scheduling, delay, and adaptive modulation switch level, on TCP performance. The paper contributes a cross-layer analysis of the interaction between symbol modulation levels, different scheduling strategies, channel prediction errors and the resulting frame retransmissions effect on TCP. The paper also shows that highly persistent ARQ with fast link retransmissions do not interact negatively with the TCP retransmission timer even for short round trip delays.

TechNet Webcast: Why Deploy IPv6? (Level 200) 0000-00-00 Microsoft

This webcast provides the answer to the question, why to deploy IP version 6 (IPv6)? The presenter of this webcast explains how IPv6 is designed to solve many of the issues in the current version of IP, IP version 4 (IPv4). The presenter discusses the limitations in IPv4, such as address depletion, security, auto-configuration, and extensibility. While providing a solution to these IPv4 limitations, IPv6 also introduces a new addressing structure. The presenter illustrates the possibilities with IPv6 address size, and also shows the new IPv6 header and address syntax.

Tags: IP Technologies

TechNet Webcast: Deploying IPSec With Windows Vista (Level 200) 0000-00-00 Microsoft

This webcast shows how innovations in the new network stack in the Windows Vista operating system can help to secure the network by providing features that enables filtering network traffic and prevent unwanted forwarding. The attendee will learn about the new features in Windows Firewall that are based on the Windows Filtering Platform (WFP). The webcast covers the new rules system, which has many scenarios already defined in an easy-to-use interface. The presenter shows how Windows Vista helps to secure connections with tightly integrated IP Security (IPSec) and also explores how the implementation of IPSec in Windows Vista improves security and interoperability in mixed networking environments.

Tags: Security Management, Windows Vista

TechNet Webcast: Next-Generation Networking With Windows Vista and Windows Server 2008 (Level 300) 0000-00-00 Microsoft

The presenter of this webcast introduces the Next Generation TCP/IP stack, which is the new implementation of the TCP/IP protocol suite in the Windows Vista operating system and Windows Server 2008. Find out how the Next Generation TCP/IP stack is a complete redesign of TCP/IP functionality for both IP version 4 (IPv4) and IP version 6 (IPv6) that meets the connectivity and performance needs of current varied networking environments and technologies. The attendee of this webcast will discover the security, performance, and scalability improvements included in the Next Generation TCP/IP stack, and also to learn how one can prepare the network for IPv6.

Tags: IP Technologies, Windows Vista, Windows Server 2008

TCP WestwoodVT: A Novel Technique for Discriminating the Cause of Packet Loss in Wireless Networks 2007-08-28 Sungkyunkwan University

Conventional TCP in wireless environment cannot differentiate packet losses caused by network congestion from those caused by wireless link errors, thus, resulting in severe performance degradation. Accordingly, efficient operation of TCP in wireless networks is a critical issue in the context of differentiation between packet loss. Towards this issue, the paper proposes a novel technique, WestwoodVT (WestwoodNR based on TCP Vegas buffer Thresholds), which is a sender-based TCP congestion control mechanism for discriminating the cause of packet loss to enhance the performance of TCP in wireless environment.

Tags: Mobile - Wireless Communications

Modeling and Performance Evaluation of iSCSI Storage Area Networks Over TCP/IP-Based MAN and WAN Networks 0000-00-00 University of Stuttgart

This paper provides a concise modeling and performance evaluation of the iSCSI Storage Area Network (SAN) architecture and protocol. SANs play a key role in business continuity, enterprise-wide storage consolidation and disaster recovery strategies in which storage resources are most often distributed over many distant data center locations. In the future, SAN traffic will be transported over IP-based networks, e. g., enterprise virtual private networks, to benefit from converged networks and save cost. In these scenarios, the impact of end-to-end delay and QoS of broadband networks on SAN performance is critical and has to be well understood by IT departments when deploying IP-storage solutions and network operators when designing transport network services for SAN applications.

Tags: Removable Storage, SANs,

A Poisoning-Resilient TCP Stack 2007-08-18 Northwestern University

The problem of large-scale TCP poisoning is treated: an attacker, who is able to monitor TCP packet headers in the network, can deny service to all flows traversing the monitoring point simply by injecting a single spoofed data or control packet into each of the flows. One of the entities responsible for this severe vulnerability is certainly the TCP protocol itself: it behaves as a "dummy" state machine that can more-than-easily become desynchronized by an attacker. This paper explores ways for upgrading TCP endpoints into viable DoS-resilient protocol entities, capable of mitigating large-scale poisoning attacks. It shows, by means of analytical modeling, simulations, and Internet experiments, how small upgrades implemented by the endpoints can dramatically improve resilience to attacks.

A Study of Flow Statistics of IP Traffic With Application to Sampling 2007-08-13 French National Institute for Research in Computer Science and Control

This paper presents a new method of statistically characterizing long TCP flows. By considering statistics over short periods of time, it is shown that robust estimations on long flows can be obtained. This observation is discussed and tested on various sets of IP traces. As an application, flow characteristics are estimated from sampled traffic. For this purpose, a new set of random variables (referred to as observables) is introduced. These observables describe the number of flows seen j times in successive time windows with fixed length. In particular, they can be easily evaluated from sampled data, notably when analyzing NetFlow records.

Mobile Ad-Hoc Intern-Domain Networking 0000-00-00 University of Cambridge

After nearly three decades of work on mobile ad-hoc networking it is starting to see a convergence of better radios and better understanding of performance needs for MANET routing schemes, delivering working networks. One part of the next stage of evolution of such systems will be to support the federation of different MANETs together, whether concatenated together or interleaved. This paper presents some initial thoughts on how one might start to tackle this interesting problem space, which appears to be rather more complex than the still contentious area of Inter-domain routing in the Internet which the creation of BGP attempted to address.

Tags: Mobile - Wireless Communications

Mitigating the Gateway Bottleneck Via Transparent Cooperative Caching in Wireless Mesh Networks 0000-00-00 Purdue University

Wireless Mesh Networks (WMNs) have been proposed to provide cheap, easily deployable and robust Internet access. The dominant Internet-access traffic from clients causes a congestion bottleneck around the gateway, which can significantly limit the throughput of the WMN clients in accessing the Internet. This paper presents MeshCache, a transparent caching system for WMNs that exploits the locality in client Internet-access traffic to mitigate the bottleneck effect at the gateway, thereby improving client perceived performance. MeshCache leverages the fact that a WMN typically spans a small geographic area and hence mesh routers are easily over-provisioned with CPU, memory, and disk storage, and extends the individual wireless mesh routers in a WMN with built-in content caching functionality. It then performs cooperative caching among the wireless mesh routers.

Tags: Gateways - Hubs, Mobile - Wireless Communications

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Title	Date Added	Company
Cross-Layer Analysis of TCP Performance in a 4G System	2007-08-31	Karlstad University
This paper presents results from an experimental study of TCP in a wireless 4G evaluation system. Test-bed results on transport layer performance are presented and analyzed in relation to several link layer aspects. The aspects investigated are the impact of channel prediction errors, channel scheduling, delay, and adaptive modulation switch level, on TCP performance. The paper contributes a cross-layer analysis of the interaction between symbol modulation levels, different scheduling strategies, channel prediction errors and the resulting frame retransmissions effect on TCP. The paper also shows that highly persistent ARQ with fast link retransmissions do not interact negatively with the TCP retransmission timer even for short round trip delays.
TechNet Webcast: Why Deploy IPv6? (Level 200)	0000-00-00	Microsoft
This webcast provides the answer to the question, why to deploy IP version 6 (IPv6)? The presenter of this webcast explains how IPv6 is designed to solve many of the issues in the current version of IP, IP version 4 (IPv4). The presenter discusses the limitations in IPv4, such as address depletion, security, auto-configuration, and extensibility. While providing a solution to these IPv4 limitations, IPv6 also introduces a new addressing structure. The presenter illustrates the possibilities with IPv6 address size, and also shows the new IPv6 header and address syntax. Tags: IP Technologies
TechNet Webcast: Deploying IPSec With Windows Vista (Level 200)	0000-00-00	Microsoft
This webcast shows how innovations in the new network stack in the Windows Vista operating system can help to secure the network by providing features that enables filtering network traffic and prevent unwanted forwarding. The attendee will learn about the new features in Windows Firewall that are based on the Windows Filtering Platform (WFP). The webcast covers the new rules system, which has many scenarios already defined in an easy-to-use interface. The presenter shows how Windows Vista helps to secure connections with tightly integrated IP Security (IPSec) and also explores how the implementation of IPSec in Windows Vista improves security and interoperability in mixed networking environments. Tags: Security Management, Windows Vista
TechNet Webcast: Next-Generation Networking With Windows Vista and Windows Server 2008 (Level 300)	0000-00-00	Microsoft
The presenter of this webcast introduces the Next Generation TCP/IP stack, which is the new implementation of the TCP/IP protocol suite in the Windows Vista operating system and Windows Server 2008. Find out how the Next Generation TCP/IP stack is a complete redesign of TCP/IP functionality for both IP version 4 (IPv4) and IP version 6 (IPv6) that meets the connectivity and performance needs of current varied networking environments and technologies. The attendee of this webcast will discover the security, performance, and scalability improvements included in the Next Generation TCP/IP stack, and also to learn how one can prepare the network for IPv6. Tags: IP Technologies, Windows Vista, Windows Server 2008
TCP WestwoodVT: A Novel Technique for Discriminating the Cause of Packet Loss in Wireless Networks	2007-08-28	Sungkyunkwan University
Conventional TCP in wireless environment cannot differentiate packet losses caused by network congestion from those caused by wireless link errors, thus, resulting in severe performance degradation. Accordingly, efficient operation of TCP in wireless networks is a critical issue in the context of differentiation between packet loss. Towards this issue, the paper proposes a novel technique, WestwoodVT (WestwoodNR based on TCP Vegas buffer Thresholds), which is a sender-based TCP congestion control mechanism for discriminating the cause of packet loss to enhance the performance of TCP in wireless environment. Tags: Mobile - Wireless Communications
Modeling and Performance Evaluation of iSCSI Storage Area Networks Over TCP/IP-Based MAN and WAN Networks	0000-00-00	University of Stuttgart
This paper provides a concise modeling and performance evaluation of the iSCSI Storage Area Network (SAN) architecture and protocol. SANs play a key role in business continuity, enterprise-wide storage consolidation and disaster recovery strategies in which storage resources are most often distributed over many distant data center locations. In the future, SAN traffic will be transported over IP-based networks, e. g., enterprise virtual private networks, to benefit from converged networks and save cost. In these scenarios, the impact of end-to-end delay and QoS of broadband networks on SAN performance is critical and has to be well understood by IT departments when deploying IP-storage solutions and network operators when designing transport network services for SAN applications. Tags: Removable Storage, SANs,
A Poisoning-Resilient TCP Stack	2007-08-18	Northwestern University
The problem of large-scale TCP poisoning is treated: an attacker, who is able to monitor TCP packet headers in the network, can deny service to all flows traversing the monitoring point simply by injecting a single spoofed data or control packet into each of the flows. One of the entities responsible for this severe vulnerability is certainly the TCP protocol itself: it behaves as a "dummy" state machine that can more-than-easily become desynchronized by an attacker. This paper explores ways for upgrading TCP endpoints into viable DoS-resilient protocol entities, capable of mitigating large-scale poisoning attacks. It shows, by means of analytical modeling, simulations, and Internet experiments, how small upgrades implemented by the endpoints can dramatically improve resilience to attacks.
A Study of Flow Statistics of IP Traffic With Application to Sampling	2007-08-13	French National Institute for Research in Computer Science and Control
This paper presents a new method of statistically characterizing long TCP flows. By considering statistics over short periods of time, it is shown that robust estimations on long flows can be obtained. This observation is discussed and tested on various sets of IP traces. As an application, flow characteristics are estimated from sampled traffic. For this purpose, a new set of random variables (referred to as observables) is introduced. These observables describe the number of flows seen j times in successive time windows with fixed length. In particular, they can be easily evaluated from sampled data, notably when analyzing NetFlow records.
Mobile Ad-Hoc Intern-Domain Networking	0000-00-00	University of Cambridge
After nearly three decades of work on mobile ad-hoc networking it is starting to see a convergence of better radios and better understanding of performance needs for MANET routing schemes, delivering working networks. One part of the next stage of evolution of such systems will be to support the federation of different MANETs together, whether concatenated together or interleaved. This paper presents some initial thoughts on how one might start to tackle this interesting problem space, which appears to be rather more complex than the still contentious area of Inter-domain routing in the Internet which the creation of BGP attempted to address. Tags: Mobile - Wireless Communications
Mitigating the Gateway Bottleneck Via Transparent Cooperative Caching in Wireless Mesh Networks	0000-00-00	Purdue University
Wireless Mesh Networks (WMNs) have been proposed to provide cheap, easily deployable and robust Internet access. The dominant Internet-access traffic from clients causes a congestion bottleneck around the gateway, which can significantly limit the throughput of the WMN clients in accessing the Internet. This paper presents MeshCache, a transparent caching system for WMNs that exploits the locality in client Internet-access traffic to mitigate the bottleneck effect at the gateway, thereby improving client perceived performance. MeshCache leverages the fact that a WMN typically spans a small geographic area and hence mesh routers are easily over-provisioned with CPU, memory, and disk storage, and extends the individual wireless mesh routers in a WMN with built-in content caching functionality. It then performs cooperative caching among the wireless mesh routers. Tags: Gateways - Hubs, Mobile - Wireless Communications