On Measuring Available Bandwidth in Wireless Networks Andreas Johnsson Research Area Packet Systems Ericsson Research Mats Björkman The Department of Computer Science and Electronics Mälardalen University Abstract— BART is a state-of-the-art active end-to-end bandwidth measurement method that estimates not only the available bandwidth but also the link capacity of the bottleneck link. It uses a Kalman filter to give estimates in real time during a measurement session. In this paper‚ we have studied
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Introduction If you’ve ever been a network administrator‚ the call you dread the most might be one you receive in the middle of the night by some panicked employee stating that a portion of your critical network has gone down. What troubleshooting options are available to provide answers to your network problem? Besides having a proactive helpdesk that can "read" the mind of your network‚ an important part of troubleshooting involves using a network protocol analyzer. If you’ve done your research
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Wireless networking is the best networking solution for networking an office. Why? It’s cheaper to deploy; there aren’t any expensive cables to purchase‚ labour for cable pulling through tight conduits‚ purchasing matching socket faceplates‚ purchasing tools and devices for cable repair / troubleshooting. There isn’t any excessive wire clutter‚ no cables running too-an-fro on the desk for computer‚ printer‚ fax‚ phone or PDA. What’s left? A clean desktop with only the mere unnoticeable power
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ABSTRACT : This paper describes the basic threats to the network security and the basic issues of interest for designing a secure network. it describes the important aspects of network security. A secure network is one which is free of unauthorized entries and hackers INTRODUCTION Over the past few years‚ Internet-enabled business‚ or e-business‚ has drastically improved efficiency and revenue growth. E-business applications such as e-commerce‚ supply-chain management‚ and remote
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Site Planning and building form are very important from the point of view of seismic performance of the structure. Also it is very important to have proper compatibility of elements resisting seismic forces. Site Planning and selection of building forms is the first step in designing of any structure and the decisions taken are very crucial for the behaviour of those structures during any earthquake. Based on examples taken from various past earthquakes and theories this chapter gives guidelines
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transmitter is represented by s(t). Version 2 CSE IIT‚ Kharagpur • Communication Medium: The signal can be sent to the receiver through a communication medium‚ which could be a simple twisted-pair of wire‚ a coaxial cable‚ optical fiber or wireless communication system. It may be noted that the signal that comes out of the communication medium is s’(t)‚ which is different from s(t) that was sent by the transmitter. This is due to various impairments that the signal suffers as it passes through
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[pic] Presented on: February 28‚ 2008 To: Professor Geraldo Alvarado For: Strategic Planning - MAN 452 By: David Ayala‚ Katrina Gallegos‚ Francisco Gonzalez and Savannah Hernandez Verizon Communications‚ Inc. Executive Summary Verizon Communications‚ Inc. is based in the state of New York. Verizon is currently considered the leader in delivering broadband and other wireline and wireless communication innovations to mass market‚ business‚ government and wholesale customers
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Virtual Private Network IS 311 Dr. Gray Tuesday 7pm November 19‚ 2002 By: Germaine Bacon Lizzi Beduya Jun Mitsuoka Betty Huang Juliet Polintan Table of Contents I. Introduction ……………………………………………….. 1 - 2 II. VPN Topology……………………………………………... 2 - 3 III. Types of VPNs……………………………………………... 3 - 5 IV. Components of VPNs………………………………………. 5 - 7 V. Productivity and Cost Benefit…………………………….... 7 - 9 VI. Quality of Service………………………………………….. 9 VII. The Future
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Models Network Management: Principles and Practice © Mani Subramanian 2000 1 Chapter 4 Case Histories • AT&T Network Management Centers • Network Operations Center • Network Control Centers • Monitors the network status • Self-healing • CNN World Headquarters • Performance Management • Fault Management • Monitoring alarms • Determines causes of failures (Artificial Intelligence) • Centralized troubleshooting of NIC (remotely) • Performance degradation due to NMS • Network may come down
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PLANNING Thinking and looking ahead Process of establishing objectives and appropriate courses of action before taking action Why plan? To be: a. EFFECTIVE – being able to realize the objectives - “doing the right thing” b. EFFICIENT – being able to spend the least amount of resources in realizing the objective - “doing things right” TYPES OF PLANS: 1. Strategic Plan - focused on the entire organization - top management formulates the objectives
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