Information and communication technology Abhishek S Arackal Generations First generation • • • • 1940 – 56s Vacuum tubes Relied on machine language Input on punch cards and paper tapes.

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Transcript Information and communication technology Abhishek S Arackal Generations First generation • • • • 1940 – 56s Vacuum tubes Relied on machine language Input on punch cards and paper tapes.

Slide 1

Information and communication
technology
Abhishek S Arackal


Slide 2

Generations


Slide 3

First generation





1940 – 56s
Vacuum tubes
Relied on machine language
Input on punch cards and paper tapes and
output on print out
• Eg:- UNIVAC and ENIAC
• expensive


Slide 4

Second generation






1956 - 63
Transistor
Smaller and cheaper
Moved from binary to assembly language
Eg:- IBM 7094, IBM 1400 series


Slide 5

Third generation





1964 - 71
Integrated circuits
Used keyboards and monitors
Eg:- IBM 370, UNIVAC 1108


Slide 6

Fourth generation






1971 - 2010
Microprocessor
No air conditioning is required
All types of high level languages can be used
Eg:- Apple Macintosh and IBM PC


Slide 7

Fifth generation





2010 –
Artificial intelligence
Understand natural human language
Can respond


Slide 8

Inventions
• Vacuum tubes –
John A Fleming

• Transistor –
William Shockly, John Bardeen,Walter H Brattain

• ICs –
Jack kilby, Robert Noyce

• Microprocessor –
Marcian E Ted Hoff, Stanley Mazor


Slide 9

Types of computer
Based on Principles
1. Analog
2. Digital
3. Hybrid


Slide 10

Analog
• Works on a continuous range of value
• Deals with physical values like voltage,
pressure, temperature etc
• Father – Lord Kelvin (William Thomson)


Slide 11

Digital
• Uses Binary Number system
• Only two digits 0 and 1
• Each 1 is called a bit


Slide 12

Hybrid
• Combination of both
• Best used in hospital
• Eg:- measuring heart beat


Slide 13

Based on configuration
1. Super
2. Main frame
3. Mini
4. Micro


Slide 14

Super
• Expensive and fast
• Weather forecasting, nuclear science,
aerodynamic modeling, seismology etc
• Companies which produced Super computers
are Cray, IBM and Hewlett Packard.
• Indian – EKA, PARAM, SAGA 220 Aaditya
• First company introduced – Control Data Corp
• Saga 220 - ISRO
• Deep Blue defeat Garry Kasparove at chess


Slide 15






First super – Cary 1– 1960
First Indian – PARAM 8000
Fastest - Tianhe II
Fastest Indian – PARAM YUVA II

• Father of super computer – Seymour Cray
• Father of Indian Super – Vijay Bhatkar


Slide 16

Main frame
• Process data at a very high speed
• 100s of millions instructions per second
• Banking, Airlines, Railways etc


Slide 17

Mini
• Lower to mainframe
• Less expensive


Slide 18

Micro
• It is single chip CPU
• Types are
desktop
laptop
handheld devices


Slide 19

• First Micro – Apple II
• First Mini – PDP 8
• First Super – Cray 1


Slide 20

Computer Organisation
• CPU
• MEMORY
• INPUT AND OUTPUT UNITS


Slide 21

CPU
• Interprets and carries out instructions
• Brain of computer
• 3 components
ALU + Control Unit + REGISTER
1. ALU – Mathematical and Logical operations
2. CU – fetch programs and control flow of
data
3. REGISTER – high speed storage areas in CPU


Slide 22

Memory Unit
• Store instructions and data
• Internal and External memory

• Internal – RAM, ROM
• External – secondary , teritiary


Slide 23

RAM
• Random Access Memory
• Short term memory
• Volatile – only as long as computer has
power
• Static RAM and Dynamic RAM


Slide 24

ROM






Read Only Memory
Called as Firmware
Non-Volatile
CACHE – memory used for fast processing
PROM, EPROM, EEPROM


Slide 25

Memory Measurement







8 bit – 1 byte
1024 byte – 1 kilobytes
1024 kilobyte – 1 megabytes
1024 megabytes – 1 gigabyte
1024 gigabyte – 1 terabyte
1024 terabyte – 1 petabyte


Slide 26

External
• Permanent storage of large data
• Secondary : needs to be used again and again
• example: harddisks, usb, flash drives, cds
dvds, memory cards, etc
• Teritiary : store information that is needed
occasionally for review purpose or for
restoring information after a system failure.
• Example : magnetic tapes, network server,
optical disk


Slide 27

Input Output devices
• Input – supply information





Keyboard
Mouse – pointing device only
Joystick – pointing device, in CAD and games
Light pen – pointing device,
to draw picture on monitor


Slide 28






Track ball – used in laptop instead of mouse
Scanner – paper to harddisk
Digitizer – analog information into digital form
Magnetic Ink Character Reader MICR –
Used in banks, bank code and
cheques with magnetic material inks
• Optical Character Reader OCR –
to read a printed text, scans text
optically character by character and converts
into a machine readable code


Slide 29

• Bar Code Reader – reading bar coded data
converts into alpha numeric values
• Optical Mark Reader –
recognize the type of mark by pen/pencil
checking answer sheets


Slide 30

Output Devices
• Monitors and printers commonly
• Speakers and headphones


Slide 31

GPRS
• General Packet Radio Service is a wireless
communication
• For sending emails, web browsing


Slide 32

Bluetooth





Short range wireless
Temporarily link between devices
Invented by telecom vendor Ericsson in 1994
Managed by Bluetooth special interest group
( SIG)


Slide 33

languages


Slide 34

languages
Low level

machine

0s and 1s

High level

assembly

Machine independent

mnemonics
Fortran,
java, c++


Slide 35

Language and developers








Basic – Thomas Kurtz
PASCAL – Nikalaus Wirth
C – Dennis Ritche
C++ - Bjarne Stroustrup
JAVA – James Gosling
COBOL – Grace Murray Hopper
FORTRAN – John Backus


Slide 36

software


Slide 37

software

System

application

OS

Android,
windows,
Linux

Utility

Copy, paste,
searching

Microsoft office,
web browser


Slide 38

Translator software


Slide 39

translator

compiler

Scans entire programs
first, then translate to
machine

interpreter

Translating high level
to machine

assembler

Assembly into
machine


Slide 40

UPS
• Uninterrupted power supply
• Power back up using a charging battery


Slide 41

windows
• It’s a GUI
• Owned by microsoft
• Its easier than DOS


Slide 42

UNIX






Used in servers, workstations, mobile devices
Developed by AT & T Bells lab
By Ken Thompson, Dennis Ritchie
C language also by AT&T
UNIX – one of the first OS in high level
language, namely C.


Slide 43

LINUX






Open source, free software
Linux Torvalds
Mascot – Tux the Penguin
Released in 5th oct 1991
Latest version – Linux Kernal 3.19, feb 2015


Slide 44

DOS
• First widely installed OS
• IBM and Microsoft version
• Non-graphical command oriented


Slide 45

WiFi and LiFi
• Wireless Fidelity
• Light Fidelity – LED used here


Slide 46

Microprocessor
• First – INTEL 4004
• First in PCs – INTEL 8080
• Largest manufacturer – INTEL


Slide 47

Storage Capacity
• CD – 700 MB
• DVD – 4.7 GB
• Floppy Disk – 1.44 MB


Slide 48

Number System


Slide 49

binary

Hexa
Decimal

Number
System

octal

decimal


Slide 50

Networking


Slide 51

Network

LAN

local

MAN

WAN

metropolitan

wide

Cable TV
network

National,
International

PAN

personal


Slide 52

• Router – connector
• ARPANET –
first operational packet switching network
by Massachusetts Institute of technology
WLAN – Wireless LAN


Slide 53

Protocol


Slide 54

protocol

TCP/IP

communication

FTP

Transfer
computer files

SMTP

Email transfer

HTTP

Data over WWW

Telnet

Connect remote
computer


Slide 55

• TCP/IP –
Transmission Control Protocol / Internet
protocol
• FTP – File Transfer Protocol
• SMTP – Simple Mail Transfer Protocol
• HTTP – Hyper Text Transfer Protocol


Slide 56

IP Address
• Numerical label assigned to each devices
• IPv4 – 32 bit
eg: 172.16.254.1
IPv6 – 128 bit, developed in 1995
eg: 2001:db8:0:1234:0:567:8:1


Slide 57

Motto






Don’t be Evil – Google
Applying Thought – Wipro
Your potential, Our Passion – Microsoft
Be What’s Next – Microsoft (new)
Power by Intellect, Driven by values - Infosys


Slide 58

Internet





Host – each internet computer
Internet Explorer – browsing software by MS
Intranet – restricted version in internet
Extranet –
closed online connecting organization


Slide 59

WWW





World Wide Web
Web Portal – gateway website to internet
ISP – internet service provider
HTML – browser can read websites in this
language, Hyper Text Markup Language
• Home Page – first page of website
• Surfing – visiting websites


Slide 60

• Epic – first Indian web browser
2010 July 15
Hidden Reflex, Bangalore
• URL – Uniform Resource Locator
address that identifies a website


Slide 61

Date and Day
• World Computer Literacy – Dec 2
• National Internet Safety – Feb 16
• International Internet Safety – Nov 30


Slide 62

Illegal Practices





Hacking – unauthorized use of computer
Spamming – sending unauthenticated emails
Phishing – email fraud method
Vishing – voice and phishing
IP telephonic version of phishing
• Email spoofing – forgery of an email head


Slide 63

• Malware – software used to damage computer
virus, worm, Trojan horse
• VIRUS – Vital Information Resources Under Siege
• First virus – creeper in ARPANET
• First personal computer virus – Elk Cloner
• First virus infected Microsoft OS – Brain
in 1986 by Farooq brothers
• First mobile virus - Cabir


Slide 64

• WORM –
stand alone malware that replicate
• TROJAN –
Non self replicating malware
• Anti Virus –
K7, McAfee, Kaspersky lab, AVG, Norton


Slide 65






First computer graphics used in film– TRON (1982)
First internet movie – Heart Beat
First film uses morphing – Willow
First computer magazine –
“computer and automation”, by Edmund
Berkely
• First real time computer – Whirlwind
• First computer animated news reader –
ANANOVA (Russia)


Slide 66

fathers








Computer – Charles Babbage
Computer Science – Alan Turing
Internet – Vinton Cerf
IT – Claud Shawn
Indian IT – Rajeev Gandhi
Super computer – Seymour Cray
Video games – Ralph Baer


Slide 67











Indian Super computer – Vijay Bhatkar
Free software - Richard Stallman
Linux – Linus Torwalds
Mobile phone – Martin cooper
Wikipedia – Jimmy wales
WWW – Tim Bernes Lee
Portable computer – Adam Osborne
ASCII code – Bob Bemer
Email – Ray Tomilson


Slide 68

Inventors





Google – Larry page and Sergey Brin
Facebook – Mark Zucker Berg
Yahoo – Jerri Yong, David Filo
Twitter – Jack Dorsey


Slide 69

Devices





Mouse – Douglas Engelbart
Keyboard – Christopher Sholes
CD – James T Russel
Floppy Disk – Alan Shugart


Slide 70

Miscellaneous


Slide 71

Internet Security


Slide 72

CIA

Confidentiality

Data not
accessed by
hackers

Integrity

Data not altered
by hackers

Availability

Authorized user
can access


Slide 73

Data
security

Encrypt

Cipher text

Decrypt

Plain text


Slide 74

Cyber Laws
• IT act 2000
• Offence is investigated by a police officer not
below the rank of the Inspector


Slide 75

offences
• Email bombing – large number of mails to victim
• Web Jacking – gains access and control over
sites
• Pornography
• Online gambling
• Trafficking
• Email spoofing
• Forgery


Slide 76

Section 43

Access, downloading,
virus

Section 65

Tampering data

Section 66

IT act

Section 67

Section 71

Hacking
Publishing obscene
matters
Penalty for misrepresentation

Section 72

Breach of privacy

Section 73

Penalty for false electronic
signature certificate


Slide 77








Section 43 – fine up to 1cr
Section 66 – imprisonment 3 years or 5 lakh
Section 67 – 3 year and 10 lakh
Section 71 – 2 year or fine 1 lakh
Section 72 – 2 year or fine 1 lakh
Section 73 – 2-5 year or 1 lakh


Slide 78

Some crimes under IPC





Web Jacking – section 373 IPC
Cyber Fraud – section 420 IPC
Email Spoofing – section 465, 419 IPC
Sending defamatory message – section 499
IPC
• Threatening message – section 506 IPC


Slide 79

• Act administered by CERT
• Appeal lies to Cyber Appellate Tribunal
first in New Delhi in 2006
• Now its called CRAT (cyber regulation A T)
• Headed by a presiding officer – high court
judge
• First officer – Justice R C JAIN
• First cyber police station - Bangalore


Slide 80

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