Communications System 1. The Data Terminal Equipment (DTE) at point A. 2. The interface between the DTE and the Data Circuit-Terminating Equipment (DCE or often called Data Communications Equipment) at point A. 3. The DCE at point A. 4. The transmission channel between points A and B. 5. The DCE at point B. 6. The DCE - DTE interface at point B. 7. The DTE at point B. DIGITAL MODULATION Phase Shift Keying -One of the simplest forms of digital modulation is binary or Bi-Phase Shift Keying
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address 19.IP address 20.Physical Layer 21.Wi-Fi Alliance 22.Frames used in which layer? 23.Packets used in which layer? Chapter 4 24.LANs 25.WANs 26.AC signal‚ DC signal 27.Electric cicuit connecting twonodes in a network 28.Full duplex transmission 29.Attenuation 30.Single-mode‚ Multi-mode cables 31.802.11g 32.CSMA/CA 33.Fiber optic cables 34.Shielded twisted pair cable vs. Unshielded twisted pair cable 35.Straight-through‚ Crossover cable 36.UTP‚ Coax‚ Single-mode (SM)‚Multi-mode
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ABSTRACT Mobile devices are getting smaller‚ lighter‚ and more powerful; they have bigger screens and longer battery life‚ more features and more capabilities .With the rapid growth of user demands‚ and the limitations of third generation (3G) mobile communication systems‚ it is expected that fourth generation (4G) mobile systems are likely to reach the consumer market in another 4-5 years. 4G systems are expected to become a platform capable of providing increased bandwidth‚ higher data rates‚
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communication are synonymous in nature.) * Message – Spoken or written information which is transmitted to someone. * Receiver – The person or audience to whom the message is sent. * Sender – The person or source that sends a message. * Transmission – The process by which electrical signals and messages are sent out by radio‚ television or any other similar equipment * Journalism – the occupation of reporting‚ writing‚ editing‚ photographing or broadcasting of news and information in
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the future off of these important inventions. How telecommunication has change business Communication started when man was able to communicate with drums and smoke signals over distances in ancient times. The word telecommunication means the transmission of information‚ as words‚ sounds‚ or images‚ usually over great distances‚ in the form of electromagnetic signals‚ as by telegraph‚ telephone‚ radio‚ or television. (Telecommunication‚ 2010) In 1836‚ Samuel Morse figured out a way to transmit
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COMPUTER | NETWORK AND COMMUNICATION | | NOTES | | | | | INDEX (COMMUNICATION AND NETWORK CONCEPT) I.NETWORK II.EVALUATION OF NETWORKING 1.ARPANET III. SWITCHING TECHNIQUES 1. CIRCUIT 2. PACKET 3. MESSAGE IV.TRANSMISSION MEDIA: Two types of media GUIDED MEDIA 1.TWISTED PAIR CABLE
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The Hitchhikers Guide to the Internet 1 The Hitchhikers Guide to the Internet Ed Krol krol@uxc.cso.uiuc.edu Get any book for free on: www.Abika.com Get any book for free on: www.Abika.com The Hitchhikers Guide to the Internet 2 This document was produced through funding of the National Science Foundation. Copyright (C) 1987‚ by the Board of Trustees of The University of Illinois. Permission to duplicate this document‚ in whole or part‚ is granted provided reference is made
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transfer of graphical images can be frustratingly slow. This report examines two enhancements to existing residential communications infrastructure: Integrated Services Digital Network (ISDN)‚ and cable television networks upgraded to pass bi-directional digital traffic (Cable Modems). It analyzes the potential of each enhancement to deliver Internet access to residential users. It validates the hypothesis that upgraded cable networks can deliver residential Internet access more cost-effectively
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its birth in 1959‚ it seems that Indian television has developed in a way that is similar to most of the world’s broadcasting sectors. Conquered by technological progress‚ particularly by the major advance that the introduction of satellite transmissions represents‚ the Indian television sector broke with its old practices to enter the era of globalization to which the opening to foreign players‚ the competition regime and the respect of commercial requirements are essential components. The
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performance of tomorrow’s networks will depend on well tuned and managed access points. A key part of managing access points is the ability to locate individual access points based on their signal. Current techniques (RSS Grandient‚ Signal Map‚ Directional Antenna) to locate outdoor WiFi access points require extensive wardriving measurements and low accuracy‚ determined by significant offline computation or complex hardware components that would cost several thousand dollars. In order to solve this
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