Objectives At the end of this lesson the students will be able to: • • • • • • • • • Explain what is data Distinguish between Analog and Digital signal Explain the difference between time and Frequency domain representation of signal Specify the bandwidth of a signal Specify the Sources of impairment Explain Attenuation and Unit of Attenuation Explain Data Rate Limits and Nyquist Bit Rate Distinguish between Bit Rate and Baud Rate Identify Noise Sources 2.1.1 Introduction A simplified model of a data
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Cryptographic Authentication for Real-Time Network Protocols1‚2 David L. Mills3 Abstract This paper describes a new security model and authentication scheme for distributed‚ real-time network protocols used in time synchronization and event scheduling applications. It outlines the design requirements of these protocols and why these requirements cannot be met using conventional cryptography and algorithms. It proposes a new design called autokey‚ which uses a combination of public-key cryptography
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Computer Networks NETWORKING CONCEPTS Network A network is basically an interconnection of various points to make a connected system e.g Road‚ Telephone‚ Social Data Network A computer network therefore refers to an interconnection of computers and other peripherals by use of a communication link Peer to Peer Networks In a peer-to-peer network‚ all computers are considered equal; they all have the same abilities to use the resources available on the network. Peer-to-peer networks are designed
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Telecommunications And Networks Learning Objectives Understand the concept of a network. Apply Metcalfe’s law in understanding the value of a network. Identify major developments and trends in the industries‚ technologies‚ and business applications of telecommunications and Internet technologies. Provide examples of the business value of Internet‚ intranet‚ and extranet applications. Learning Objectives Identify the basic components‚ functions‚ and types of telecommunications networks used in
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Manuel Castells Materials for an explorator y theory of the network society1 ABSTRACT This article aims at proposing some elements for a grounded theor y of the network society. The network society is the social structure characteristic of the Information Age‚ as tentatively identi ed by empirical‚ cross-cultural investigation. It permeates most societies in the world‚ in various cultural and institutional manifestations‚ as the industrial society characterized the social structure of
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new self-propagating worms in 2001‚ some of which have been used to deploy DoS attack technology. Windows end-users and Internet routing technology have both become more frequent targets of intruder activity. The control mechanisms for DDoS attack networks are changing to make greater use of Internet Relay Chat (IRC) technology. The impacts of DoS attacks are causing greater collateral damage‚ and widespread automated propagation itself has become a vehicle for causing denial of service. While DoS
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increases (at least initially) with the increase in the number of stations in a token-ring LAN? A) There are too many differences between Token Ring and Ethernet to list out here. You could read more about it from many useful search results for "ethernet vs. token ring." I’ll point out a key difference and give you a source answering your question on performance. Ethernet is based on CSMA/CD (carrier sense multiple access with collision detection)‚ meaning multiple stations sense the carrier at the same
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Managing TCP/IP Networks: Techniques‚ Tools and Security Considerations. Gilbert Held Copyright & 2000 John Wiley & Sons Ltd Print ISBN 0-471-80003-1 Online ISBN 0-470-84156-7 MANAGING TCP/IP NETWORKS Managing TCP/IP Networks: Techniques‚ Tools and Security Considerations. Gilbert Held Copyright & 2000 John Wiley & Sons Ltd Print ISBN 0-471-80003-1 Online ISBN 0-470-84156-7 MANAGING TCP/IP NETWORKS: TECHNIQUES‚ TOOLS‚ AND SECURITY CONSIDERATIONS Gilbert Held 4 Degree Consulting Macon
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Network Bandwidth Predictor (NBP): A System for Online Network performance Forecasting Alaknantha Eswaradass‚ Xian-He Sun‚ Ming Wu Department of Computer Science Illinois Institute of Technology Chicago‚ Illinois 60616‚ USA {eswaala‚ sun‚ wuming}@iit.edu Abstract The applicability of network-based computing depends on the availability of the underlying network bandwidth. However‚ network resources are shared and the available network bandwidth varies with time. There is no satisfactory solution
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and generating awareness formed part of activities of SASE. A vast network of high altitude observatories was also established. Planned reconnaissance of avalanche prone axes in J&K‚ HP was conducted and Avalanche Atlases were prepared. Cold Laboratory was established in 1990 and research on snow physics and mechanics was initiated. In nineties‚ the installation of Automatic Weather Stations (AWS) was initiated to densify the network of weather observation station in Himalaya. SASE steadily stood
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