The Internet

1
The Internet

• Week 2

2
Cyberspace- Definitions

• People using the new technology to communicate
  with one another
• Person to person communication - that is
  many-to-many
• The use of computer technology

3
Everyday Uses in Cyberspace

• 1980s
• Word Processing, Document preparation
• Telecommuting, Teleworking
• Childrens games, Recreation

4
Everyday Uses of Cyberspace

• 1990s until Today
• Childrens school work, Education
• Adult Remote Education at home
• Family/Friends Communications, Correspondence
• Reading News events, casual reading
• Family Travel, Recreation
• Family Records
• Home Banking, Financial Management
• Facebook, etc.

5
Everyday Uses of Cyberspace

• In-store and other purchases
• ATM, Debit card
• Home Shopping
• TV, on-line services, Smartphones
• Food Preparation
• multimedia, TV, On-line services

6
Everyday Uses of Cyberspace

• Future (almost here)
• Household Automated Tasks
• Smart home
• Smart appliances
• Home robotics
• Home information systems

7
The Internet

• Worldwide connection
• 60,000,000,000,000 webpages
• 4.38B users
• TCP/IP

8
Internet History

• 1960s - ARPA
• packet switching
• 1970s - Universities
• LAN
• Email
• UNIX
• Newsgroups

9
Internet History

• 1980s - MILnet, NSFnet
• DNS
• No longer only research oriented (business)
• TCP/IP
• reliable, efficient?, robust

10
Internet History

• 1990s until Today
• WWW born
• Commercialization
• Advertisements
• Ordinary people publish
• Smartphones
• Video Streaming

11
Reason for Success?

• No central authority
• Inexpensive
• Capabilities are popular
• Easy to use

12
Impacts of WWW

• Opening of access to information
• Reduction of delay for information
• Evolution of hypertext

13
Metcalfes Law

• The value of a network is proportional to the
  square of the number of its users

14
Original Uses

• Remote Login
• File Transfer
• Research

15
The Basic Uses of the Net

• E-mail
• Discussion groups
• File transfer
• Long distance computing
• Research
• Data/Image Transfer
• General Communications

16
E-Mail - Uses

• Send messages
• Work
• Personal
• MIME capabilities

17
E-Mail - Advantages

• No busy signal
• Reader can view at any time
• Cost effective
• Fast
• Reliable

18
E-Mail - Advantages

• Facilitates teleworking
• Promotes communication that would normally not
  take place due to costs

19
E-Mail - Disadvantages

• Have to be networked to use it
• Not 100 reliable
• Who else is reading the mail?

20
Discussion Groups - Uses

• Share ideas
• Education
• Spread beliefs to others

21
Discussion Groups - Disadvantages

• Anonymity - Who is really there with you?
• Subject matter digresses
• Truth of information unconfirmed

22
Other Uses

• Banking
• Shopping
• Telemedicine
• Education
• General source of information
• Personal Connections

23
Advantages

• No need to get in a car
• Saves
• Exposure to things not available before
• Reach more people

24
Disadvantages

• Privacy
• Secure transfers of information
• Hackers
• Cant use everywhere
• Children and censorship
• Illegal activity - piracy, gambling