Cyber revoluion

CYBER REVOLUTION

By pradeeprajr93@gmail.com

What’s it ?

▪ Cyber - related to computer

▪ Revolution - sudden or abrupt change

Cyber revolution:

Sudden change in the field of computers.

VANISHING BORDERS IN CYBERSPACE

3

• In Cyberspace territorial boundaries are

meaningless • Internet address has no relation to the physical

location of the computer or its user

History of Evolution Of Computers

Two Eras:

▪ Mechanical Era (Before 1945)

▪ Electronic Era (1945 - )

Can be divided into generations

▪ First Generation (1945 – 1954)

▪ Second Generation (1955 – 1964)

▪ Third Generation (1965 – 1974)

▪ Fourth Generation (1975 - today)

▪ Fifth generation (towards artificial intelligence)

Evolution of Computers

History of Computers - Long, Long Ago

▪ beads on rods to count and calculate

▪ still widely used in Asia!

History of Computers - Way Back When

• Slide Rule 1630

• based on Napier’s rules for logarithms

• used until 1970s

IBM PC - 1981

▪ IBM-Intel-Microsoft joint venture

▪ First wide-selling personal computer used in business

▪ 8088 Microchip - 29,000 transistors – 4.77 Mhz processing speed

▪ 256 K RAM (Random Access Memory) standard

▪ One or two floppy disk drives

Apple Computers

▪ Founded 1977

▪ Apple II released 1977 – widely used in schools

▪ Macintosh (left) – released in 1984, Motorola 68000

Microchip processor – first commercial computer with

graphical user interface (GUI) and pointing device (mouse)

SUPER COMPUTERS ▪ 1000 Trillion calculations per seconds (PETAFLOPS)

Tianhe-2 - 33.86 PFs ( CHINA)

▪ FLOPS – FLOating Point operation Per Second

A Computer System

Advantages of Using Computers

▪ Speed: Computers can carry out instructions in less than a millionth of a second.

▪ Accuracy : Computers can do the calculations without errors and very accurately.

▪ Diligence : Computers are capable of performing any task given to them repetitively.

▪ Storage Capacity : Computers can store large volume of data and information on magnetic media.

What is OPERATING SYSTEM?

Acts as an interface between Humanbeing and Computer

Types of Computers

On the basis of Computing Power & Size:

▪ Laptop / Palmtop

▪ Micro Computer / Desktop

▪ Mini Computer / Mainframe

▪ Super Computer

Modern Computer has

▪ Input ------ Keyboard, mouse, touchpad

▪ Output------ Monitor, speakers

▪ High operating speed

▪ Compact size

▪ User-friendly

What these components do

▪ Power Supply – (heart) supplies power to all the circuitry and devices.

▪ Motherboard – (body) acts as a manager for everything on the computer – connects all the other components together.

▪ CPU – Central Processing Unit – (brain) this does all the work of computing.

Examining the parts of Computer

MOTHERBOARD

6/9/2014

MAIN PRINTED CIRCUIT BOARD OF COMPUTER

RAM - RANDOM ACCESS MEMORY

HARD DISK:

• Non sequential • Secondary Storage • Huge memory storage

RIBBON CABLES:

polarized

Video Card - For better rendering

Sound Card

How it became popular?

▪ Graphic User Interface ( GUI )

▪ Compact and user-friendly

HENCE PROVED!

Digital Revolution Internet Infra in INDIA

27

4.8 Mil. High Speed Internet

65 Mil. Internet Users

248 Mil. Mobile Phones

8 Mil. Mobile Phones being added per month

Internet

BSNL

Bharti

TATA Communications

Reliance

ERNET

Mail Servers

1Mil. Domains (0.5 Mil. “.in”)

DNS

130+ IDCs 134 Major

ISPs

`

VOIP, IPTV

NIC

INDIA Internet Infrastructure:2008.5

Govt.

Academia

Enterprise

Home

Tele Density 24 per 1000 person

IT / ITES BPO

Targetted Broadband connection = 10 Mil. (2010)

Other side

Cyber crime

▪ Hacking

▪ Creating and spreading virus

▪ and so on…

Think before you Click

Good road with bad drivers

A So Good Friend and a very bad enemy !

Issues

▪ Internet became popular day by day ▪ People started to Harness the power of Internet for

commercial purpose ▪ What Hacker does? – Inorder to raise the traffic hit of a particular

website, they write code for that. – How to separate computer and Human

in Brainless resourceful Internet ???? – Answer in next slide !!!!

Know Something

CAPTCHA

Completely Automated Public Turing test to tell Computers and Humans Apart

Prove that you are not a robot

Why we go for QWERTY?

To share all letters with all fingers and to attain easy fast typing Commonly used letters in middle row, ready to our fingers Rare letters are in corners, far from our fingers.

And Finally it’s my turn to

QUESTIONS ? Post ur Qs to pradeeprajr93@gmail.com