1 Computer Network & Communication Pertemuan 3 & 4 Matakuliah: V0062/Pengantar Teknologi Informasi Tahun: 2008.

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Presentation transcript:

1 Computer Network & Communication Pertemuan 3 & 4 Matakuliah: V0062/Pengantar Teknologi Informasi Tahun: 2008

Computer Network History The digital basis of Computers –Electrical Signals as discontinues bursts The Analog basis of Life –Electrical signals as continuous waves Purpose of the modem –Converting digital signals to analog signals & back »Analog signals are continous waves that transmit information by altering the characteristics of the waves. »Digital signals are discrete pulses that are either on or off, representing a series of bits (0s and 1s) 2

Computer Networks The major components of a telecommunications system : Hardware Communications media Communications network Communications software Data communications providers Communications protocols Communications applications 3

Communication processors Communication processors are hardware devices that support data transmission and reception across a telecommunication system, these devices include: »modems »multiplexers »front-end processors 4

Communication processors 5

Communications channels 6

7

Computer Network Types of computer networks LAN 8

Computer network WAN –Value-added networks –Virtual private networks Enterprise networking –Multiple LAN’s and multiple WAN’s 9

The Future of communications What are the characteristics of the next generation of wired & wireless communications? »Satellite-based system »Beyond 3G to 4G »Photonics : Optical technologies at warp speed »When utilities become communication companies »Software-Defined Radio »A New way to compute : The Grid 10

Communication Type of Virtual meetings »Teleconferencing » »One to many satellite phones »Videophone videoconferencing »Webcam videoconferencing : Video chat on the Cheap »Workgroup computing or web conferencing »Future conferencing on 3.5G - 4G Mobile phones 11

Individual Quiz Quiz for SGLC / OFC 1.What are the main business reasons, esp for hotel industry using LANs? 2.What is the difference between LANs and WANs? 3.Describe the 8 basic types of communications media, including their advantages & disadvantages 4.What could be the future of satellite systems? Is 4G possible? 12

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