Information and Communication Technology: Introductory Concept

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Transcript Information and Communication Technology: Introductory Concept

Sayed Ahmed
Computer Engineering, BUET
MSc. Computer Science, Canada
President/Chief Architect/Lead Developer
Justetc (Just et cetera) Technologies
http://www.justetc.net
http://sayed.justetc.net
[email protected]
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Canada Address
 Trudelle Street
 Toronto, Ontario, Canada
 Contact
▪ Sayed Ahmed
▪ [email protected]
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Bangladesh Address
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Justetc Computers
Habib Complex (2nd Floor)
Shimultuly, Gazipur, Dhaka
Bangladesh
Contact
▪ Rafiqul Islam
▪ [email protected]
▪ 01942747702
Just Etc Technologies, [email protected]
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Training and Education in Bangla:
Bangla.SaLearningSchool.com
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Training and Education in English:
www.SaLearningSchool.com
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Training and Education in English:
English.SaLearningSchool.com
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Ask a question and get answers : Ask.JustEtc.net
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Offline IT Training:
University.JustEtc.net
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What is Information Technology
 Concerned with
▪ Collection, dissemination, processing, and storage of
▪ Information esp. with the use of computers
▪ Design, development, implementation, support,
management of
▪ Information Systems – computer based
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Technologies related to data communications
Data Communication
 Carry data from one place to another or one
device to another
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Examples
 Telephone
 Mobile
 Internet
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IT + CT = ICT
IT in a broader term includes both
 IT
 CT
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IT now also refers to ICT
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Computing and Information Systems
 Electronic Data Processing, Artificial Intelligence,
Expert Systems
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Broadcasting
 Radio and Television
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Telecommunications
 Fixed line telephones, mobile phones
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The Internet
 Uses telecommunications infrastructure
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Basic Communication
 Fixed phone, mobile, fax, radio, television
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Basic Information Technology
 Uses basic software and printers
 Used in basic everyday needs
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Advanced Communications
 Email, Internet Browsing, Video Conferencing,
ecommerce, VOIP
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Advanced IT
 Advanced software are used for complex needs
▪ DBMS, Information Systems, Enterprise Resource Planning,
Inventory Management
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Computer
 Central tool
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Radio
Television
Internet
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Radio: Sound wave to Electro Magnetic Wave
 FM broad cast: 87.5 to 108.0 MHz
 AM broadcast
 Microwave broadcast
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http://ptolemy.eecs.berkeley.edu/eecs20/sidebars/rad
io/spectrum.gif
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Television
▪ NTSC
▪ PAL
▪ Used in Bangladesh
▪ SECAM
▪ HDTV
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The Internet
 The largest computer network in the world
 Consists of many interconnected network of
▪ Small sizes
▪ Large sizes
 Has more than 100 Crore computers
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Internet History
 ARPANET
▪ 1969: USA military interconnected four university computers
in a network called ARPANET
▪ 1982: TCP/IP got invented. In 1983, ARPANET started to use
TCP/IP protocol
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Expansion of the Internet
 1969 to 1983:
▪ Experimental stage
▪ Slow expansion
▪ Covered 20 countries
▪ Around 200 computers got connected
 80s:
▪ NSFNET was established on 1986
▪ Active research started on the Internet Technologies
▪ ARPANET was closed on 1990, and got named as the Internet
▪ ISPs were created on 1989
▪ So everyone got the opportunity to get connected to the Internet
▪ ISOC (Internet Society) was established on 1992
▪ Now, you can connect to the Internet using cell phones
Thanks
Post your questions
at
http://ask.justetc.net