Xem 1-20 trên 209 kết quả Data transmission
  • Introduction Data into a computer (via a keyboard) is encoded by the electronics within the keyboard into an equivalent binary-coded pattern using standard coding schemes: Two most common schemes: EBCDIC (Extended Binary Coded Decimal Interchange Code): 8-bit code ASCII ((American Standards Committee for Information Interchange): 7-bit code

    ppt87p doanhung_dtvtk10 19-03-2013 27 5   Download

  • Data Link Layer. Learning Objectives Upon completion of this chapter, you will be able to: Explain the role of Data Link layer protocols in data transmission. Describe how the Data Link layer prepares data for transmission on network media. Describe the different types of media access control methods. Identify several common logical network topologies and describe how the logical topology determines the media access control method for that network. Explain the purpose of encapsulating packets into frames to facilitate media access. ...

    pdf48p thanhtung_hk 03-11-2010 132 34   Download

  • Data communications and networking are changing the way we do business and the way we live. Business decisions have to be made ever more quickly, and the decision makers require immediate access to accurate information. Why wait a week for that report from Germany to arrive by mail when it could appear almost instantaneously through computer networks? Businesses today rely on computer networks and internetworks.

    pdf1171p hoangchung_dtvt 10-12-2012 73 28   Download

  • Tham khảo sách 'data and computer communications', kỹ thuật - công nghệ, kĩ thuật viễn thông phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

    pdf901p hoangchung_dtvt 10-12-2012 68 17   Download

  • In this module, students will learn how to determine threats and analyze risks to data transmission in an organization. Students will also learn how to design security for different types of data transmission, including traffic on local area networks (LANs), wide area networks (WANs), virtual private networks (VPNs), wireless networks, and the Internet.

    pdf1p thutrang 28-08-2009 62 11   Download

  • Signals: In a communication system, data are propagated from one point to another by means of electromagnetic signals. A signal is a series of analogue or digital data. That is a varying voltage (either continuous or discrete) with time in an electronic communication system. Definitions of Data and Signals: Analog Data - Data represented by a continuous physical quantity whose magnitude is proportion a suitable function of the data (information). It can have more than two discrete values in contrast to digital data. ...

    pdf7p doxuan 13-07-2009 92 7   Download

  • Telephone networks use circuit switching. The telephone network had its beginnings in the late 1800s. The entire network, which is referred to as the plain old telephone system (POTS), was originally an analog system using analog signals to transmit voice.

    ppt37p trada85 22-01-2013 23 4   Download

  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Secure and Efficient Data Transmission over Body Sensor and Wireless Networks

    pdf18p dauphong16 20-02-2012 16 3   Download

  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Design and Realization of a New Signal Security System for Multimedia Data Transmission

    pdf15p sting12 11-03-2012 19 3   Download

  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Cryptanalysis of a New Signal Security System for Multimedia Data Transmission

    pdf12p dauphong20 11-03-2012 23 3   Download

  • Unipolar All signal elements have same sign Polar One logic state represented by positive voltage the other by negative voltage Data rate Rate of data transmission in bits per second Duration or length of a bit Time taken for transmitter to emit the bit

    ppt45p trada85 18-01-2013 24 3   Download

  • Congestion occurs when the number of packets being transmitted through the network approaches the packet handling capacity of the network Congestion control aims to keep number of packets below level at which performance falls off dramatically Data network is a network of queues Generally 80% utilization is critical Finite queues mean data may be lost

    ppt45p trada85 18-01-2013 15 3   Download

  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Data processing techniques for a wireless data transmission application via mud

    pdf8p dauphong12 07-02-2012 22 2   Download

  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài:Link Adaptation for Framed Multimedia Data Transmission over a DS-CDMA Communication System

    pdf14p dauphong20 11-03-2012 11 2   Download

  • Upon completion of this chapter, you will be able to: Explain the role of Data Link layer protocols in data transmission, describe how the Data Link layer prepares data for transmission on network media, describe the different types of media access control methods,... Inviting you to refer.

    pdf96p youcanletgo_01 04-01-2016 10 2   Download

  • The content in chapter 5 explain basic data transmission concepts, including full duplexing, attenuation, latency, and noise; describe the physical characteristics of coaxial cable, STP, UTP, and fiber-optic media; compare the benefits and limitations of different networking media;...

    pdf20p kiepnaybinhyen_02 29-12-2015 3 1   Download

  • In this chapter, you learned to: Explain the role of Data Link layer protocols in data transmission, describe how the Data Link layer prepares data for transmission on network media, describe the different types of media access control methods,... Inviting you to refer.

    ppt21p youcanletgo_01 30-12-2015 9 1   Download

  • Chapter 9 - Using telephone and cable networks for data transmission. This chapter shows how the issues discussed in the previous chapters can be used in actual networks. In this chapter, we first discuss the telephone network as designed to carry voice. We then show how it can be used to carry data. Second, we discuss the cable network as a television network. We then show how it can also be used to carry data.

    ppt37p tangtuy04 12-03-2016 5 1   Download

  • Chapter 6 - Physical layer. In this chapter, we study the duties of the physical layer, first as a converter that converts data to signals, then as a manager that controls the medium. After reading this chapter, the reader should be able to: Distinguish between analog and digital data, distinguish between analog and digital signals, understand the concept of bandwidth and the relationship between bandwidth and data transmission speed,...

    ppt66p nhanmotchut_2 19-10-2016 0 0   Download

  • There are many occasions when data need to be transmitted over a voice communication network. Many people use a computer to connect to their Internet Service Provider via the telephone lines to transmit and receive data, check their email, surf the Web, etc. Telephone networks were originally built for human speech, not for computer data and is unsuitable for digital communication in its raw form.

    pdf14p doxuan 13-07-2009 160 44   Download

Đồng bộ tài khoản