| Date post: | 13-Apr-2017 |
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Technology |
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Sayed AhmedComputer Engineering, BUETMSc. Computer Science, CanadaPresident/Chief Architect/Lead DeveloperJustetc (Just et cetera) Technologieshttp://www.justetc.nethttp://[email protected]
Canada Address Trudelle Street Toronto, Ontario, Canada Contact▪ Sayed Ahmed▪ [email protected]
Bangladesh Address Justetc Computers Habib Complex (2nd Floor) Shimultuly, Gazipur, Dhaka Bangladesh Contact▪ Rafiqul Islam▪ [email protected]▪ 01942747702
2Just Etc Technologies, [email protected]
Training and Education in Bangla: Bangla.SaLearningSchool.com
Training and Education in English: www.SaLearningSchool.com
Training and Education in English: English.SaLearningSchool.com
Ask a question and get answers : Ask.JustEtc.net
Offline IT Training: University.JustEtc.net
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
Technologies related to data communications
Data Communication Carry data from one place to another or
one device to anotherExamples
Telephone Mobile Internet
IT + CT = ICT IT in a broader term includes both
IT CT
IT now also refers to ICT
Computing and Information Systems Electronic Data Processing, Artificial
Intelligence, Expert SystemsBroadcasting
Radio and TelevisionTelecommunications
Fixed line telephones, mobile phonesThe Internet
Uses telecommunications infrastructure
Basic Communication Fixed phone, mobile, fax, radio, television
Basic Information Technology Uses basic software and printers Used in basic everyday needs
Advanced Communications Email, Internet Browsing, Video Conferencing,
ecommerce, VOIP Advanced IT
Advanced software are used for complex needs▪ DBMS, Information Systems, Enterprise Resource
Planning, Inventory Management
Computer Central tool
RadioTelevision Internet
Radio: Sound wave to Electro Magnetic Wave FM broad cast: 87.5 to 108.0 MHz AM broadcast Microwave broadcast
http://ptolemy.eecs.berkeley.edu/eecs20/sidebars/radio/spectrum.gif
Television▪ NTSC▪ PAL▪ Used in Bangladesh
▪ SECAM▪ HDTV
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 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
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
ThanksPost your questions
athttp://ask.justetc.net
