Introduction.pdf - CS4344 – Computer Networks and Distributed Systems Introduction Dr Padmaraj Nair “The fundamental problem of communication is

Introduction.pdf - CS4344 – Computer Networks and...

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CS4344 – Computer Networks and Distributed Systems Introduction Dr. Padmaraj Nair
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“The fundamental problem of communication is that of reproducing at one point either exactly or approximately a message selected at another point” - The Mathematical Theory of Communication , Claude Shannon
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Technological Advancement Driving Forces
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Notable Trends Trend toward faster and cheaper, in both computing and communication More powerful computers supporting more demanding applications The increasing use of optical fiber and high- speed wireless has brought transmission prices down and greatly increased capacity Today’s networks are more “intelligent” Differing levels of quality of service (QoS) Variety of customizable services in the areas of network management and security The Internet, the Web, and associated applications have emerged as dominant features for both business and personal network landscapes “Everything over IP” Intranets and extranets are being used to isolate proprietary information Mobility iPhone, Droid, and iPad have become drivers of the evolution of business networks and their use Enterprise applications are now routinely delivered on mobile devices Cloud computing is being embraced
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Digital Electronics The rapid conversion of consumer electronics to digital technology is having an impact on both the Internet and corporate intranets Image and video traffic carried by networks is dramatically increasing Because of their huge storage capacity digital versatile disks (DVDs) are being incorporated into Web sites Digital camcorders have made it easier to make digital video files to be placed on corporate and Internet Web sites
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Communications Tasks
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Transmission Lines The basic building block of any
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