Architecture for the management and presentation of communication network performance data

Packet based data networks such as BT's Switched Multi- megabit Data Service (SMDS) have performance that varies with customer behaviour, network design and network pro- vision. This paper describes a system researched to monitor such networks from the customer's perspective, but on be- half of the operator. The information generated allows the operator to determine whether the network is performing correctly or whether changes or customer load will require the network to be changed in some way. Such networks are increasing important as many parts of the Internet are built on similar technologies. The paper speci cally considers an architecture which encompasses all the main functionality involved in perfor- mance management of networks. Consideration is given to the management and dissemination of the data collected. A database to enhance network data mining performance is described. A method to identify the periods of signi - cance in the measurement data based on a statistical test and a neural network is incorporated into a realisation of the architecture. In addition, a novel mechanism for the real-time presentation of the network performance data in an operator-friendly manner is given

NF01-459 Internet/World Wide Web Glossary of Terms

A small java program can be embedded in an HTML page. Applets differ from full-fledged java applications in that they are not allowed to access certain resources on the local computer, such as files and serial devices (modems, printers, etc.), and are prohibited from communicating with most other computers across a network. The current rule is that an applet can only make an Internet connection to the computer from which the applet was sent

Future of asynchronous transfer mode networking

The growth of Asynchronous Transfer Mode (ATM) was considered to be the ideal carrier of the high bandwidth applications like video on demand and multimedia e-learning. ATM emerged commercially in the beginning of the 1990\u27s. It was designed to provide a different quality of service at a speed up 100 Gbps for both real time and non real time application. The turn of the 90\u27s saw a variety of technologies being developed. This project analyzes these technologies, compares them to the Asynchronous Transfer Mode and assesses the future of ATM

Multimedia Networks: Fundamentals and Future Directions

Multimedia has become an integral part of computing and communications environment, and networks are carrying ever-increasing volume of multimedia information. The main characteristics of multimedia information are high-volume and bursty traffic, with low tolerance to delay and delay variance. The legacy networks (designed in 70s and 80s) are not able to meet these requirements. Enhancements to the older networking technologies have been developed to convert these into multimedia networks. Enhancements to LANs include Switched Ethernet, Isochronous Ethernet, Fast Ethernet, 100VGAnyLAN, FDDI-II, and Synchronous FDDI. WAN options for multimedia networking include digital leased lines and ISDN. The Internet has revolutionized business and personal communications, but falls short of being a genuine multimedia network. To make the Internet capable of carrying multimedia traffic, new protocols such as MBone, ST-II, RTP, and RSVP have been developed. Internet2 is a new initiative that is aimed at overcoming the problems of throughput, delay and jitter encountered on the original Internet. One technology that was developed with multimedia networking as one of its main applications, is the Asynchronous Transfer Mode (ATM) technology. Upcoming Gigabit Ethernet technology will provide a path for upgrading current Ethernet networks into multimedia networks

The Impact of the Internet on Telecommunication Architectures

The ever-growing popularity of the Internet is dramatically changing the landscape of the communications market place. The two separate worlds of the Internet and Telecommunications are converging. The respective advantages of the two environments are being integrated to fulfill the promise of the information super-highways. In this paper, we examine the impact of the Internet on the main telecommunication architectures, namely the IN, the TMN and TINA. There are two new tendencies for implementing telephony services in combination with the Internet: running part of the control sys tem over the Internet, or conveying both the user data and the control information over the Internet. We examine these two trends, and elaborate on possible ways of salvaging the best parts of the work achieved by the TINA-Consortium in the Internet context

Técnicas para la gestión del ancho de banda en la Wan con soporte en Routers Cisco 2600

Se presenta una recopilación de las técnicas para la gestión del ancho de banda en la WAN, agrupadas según el enfoque que utilizan para resolver el problema de desempeño de la red. La inclusión dentro de una agrupación no es estricta lo que implica que una técnica puede estar involucrada en varias agrupaciones. Luego se estudian y documentan las capacidades de la familia de routers Cisco 2600 para soportar protocolos WAN (ATM, Frame Relay, RDSI, SMDS y X.25). Se muestra en forma detallada cómo simular o emular una implementación completa del protocolo Frame Relay y la técnica de gestión del ancho de banda Frame Relay Traffic Shaping, en los routers y routers que actúan como switches Frame Relay, al configurar las dos interfases seriales con que actualmente disponen los routers del laboratorio de redes de la Universidad Tecnológica de Bolívar. Al final se encuentran las conclusiones del por qué se realizaron las prácticas de laboratorio utilizando Frame Relay y notas acerca de la recopilación de las técnicas de gestión del ancho de banda en la WANIncluye bibliografí

Supporting distributed computation over wide area gigabit networks

The advent of high bandwidth fibre optic links that may be used over very large distances has lead to much research and development in the field of wide area gigabit networking. One problem that needs to be addressed is how loosely coupled distributed systems may be built over these links, allowing many computers worldwide to take part in complex calculations in order to solve "Grand Challenge" problems. The research conducted as part of this PhD has looked at the practicality of implementing a communication mechanism proposed by Craig Partridge called Late-binding Remote Procedure Calls (LbRPC). LbRPC is intended to export both code and data over the network to remote machines for evaluation, as opposed to traditional RPC mechanisms that only send parameters to pre-existing remote procedures. The ability to send code as well as data means that LbRPC requests can overcome one of the biggest problems in Wide Area Distributed Computer Systems (WADCS): the fixed latency due to the speed of light. As machines get faster, the fixed multi-millisecond round trip delay equates to ever increasing numbers of CPU cycles. For a WADCS to be efficient, programs should minimise the number of network transits they incur. By allowing the application programmer to export arbitrary code to the remote machine, this may be achieved. This research has looked at the feasibility of supporting secure exportation of arbitrary code and data in heterogeneous, loosely coupled, distributed computing environments. It has investigated techniques for making placement decisions for the code in cases where there are a large number of widely dispersed remote servers that could be used. The latter has resulted in the development of a novel prototype LbRPC using multicast IP for implicit placement and a sequenced, multi-packet saturation multicast transport protocol. These prototypes show that it is possible to export code and data to multiple remote hosts, thereby removing the need to perform complex and error prone explicit process placement decisions

Disponibilidade, desempenho e segurança do ambiente de tecnologia da informação com acordo de nível de serviços utilizando ATM

Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Ciência da Computação.Este trabalho apresenta uma proposta para implementação de recursos visando assegurar uma alta disponibilidade e segurança do ambiente de Tecnologia da Informação. Serão considerados os aspectos do Acordo de Nível de Serviço (SLA - Service Level Agreement), a implementação da tecnologia ATM (Asynchronous Trasnfer Mode) integrada às redes convencionais. O trabalho apresenta algumas propostas para as diretrizes de segurança da informação de uma organização, visando preservar a confidencialidade, integridade e disponibilidade das informações da instituição. Esta proposta é aplicável aos sistemas informatizados e os meios convencionais de processamento, comunicação e armazenamento de informações. O trabalho pretende fomentar a busca de orientação para a conduta considerada adequada aos negócios e aos objetivos da organização. Serão recomendadas tecnologias adequadas ao backbone da rede e ao Server Farm, apontando os pontos indispensáveis para manter uma disponibilidade de acordo com as exigências de um SLA. Serão sugeridas políticas de proteção das informações contra desnutrição, modificação e divulgação indevida, quer sejam acidentais ou intencionais. Serão destacadas as alternativas do LANE como serviço de integração das LANs convencionais ao ATM e o VRRP - Virtual Route Redundance Protocol (RFC 2338) como serviço de aumento da disponibilidade no backbone ATM e no Server Farm

Communication Architecture For Distributed Interactive Simulation (CADIS): Rationale Document Draft

Report is concerned with the necessary communication system protocol data unit standards which must be accepted and adopted for supporting distributed interactive simulation