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Introduction to Computer Networks

This lecture provides an introduction to computer networks, covering historical events, the working of telephone systems, and the development of the internet. It includes videos on the history of computers and telephone systems, as well as a discussion on the telephone system and internet. The lecture also covers communication in computer networks and the various types of computer networks.

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Introduction to Computer Networks

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  1. Introduction to Computer Networks Lecture 1

  2. Lecture Summary • Video on History of Computers • https://www.youtube.com/watch?v=4diPtsUv3sg • Video on Working of Telephone • https://www.youtube.com/watch?v=t2eTOqLpT6Q • Discussion about telephone system and internet • Introduction to computer Networks

  3. Introduction to Computer Networks Historical Events `` • 1948 first commercial installed UNIVAC I • 1958 first U.S. communication satellite • 1964 SABRE airline reservation system packet switching network (proposed by RAND) • 1969 ARPANET first packet switching network begins operation

  4. Introduction to Computer Networks Historical Events (contd.) `` • 1971 first computer chip-4 bit,2,300 transistors • 1972 Ethernet specifications formulated • 1974 IBM introduces SNA(network) • 1975 Altair 8800 first commercial microcomputer sold as kit

  5. Introduction to Computer Networks Historical Events(contd.) `` • 1975 Paul Alan / Bill Gates wrote a BASIC language interpreter for the Altair, they formed Microsoft • 1976 Woznaik and jobs built Apple I and formed Apple Computer Company • 1976 Visicalc first commercial spread sheet introduced

  6. Introduction to Computer Networks Historical Events(contd.) `` • 1981 IBM introduced IBM PC one floppy • 1983 TCP/IP becomes the official protocol on ARPANET • 1984 Apple introduced GUI with Apple Macintosh • 1986 laptop PC

  7. Introduction to Computer Networks Historical Events(contd.) `` • In mid 1960’s USA DoD wanted a command and control network that could survive a nuclear attack. • The subnet would consist of Honeywell 12KW Intermediate message processors connected by 64kbps lines leases from telephone company.

  8. Introduction to Computer Networks Communication: what and how? ``

  9. Introduction to Computer Networks Computer Networks • Computer network connects two or more autonomous computers. • The computers can be geographically located anywhere.

  10. Introduction to Computer Networks Computer Networks • Point to point-Dedicated (simplex, half duplex, full duplex)-Shared (multiplexing) • Broadcasting-Dedicated (Channel Level- one way)-Shared (Multiple access) • Multicasting

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