Unit 12

1
Unit 12
The Internet
2
Introduction
Introduction
The Internet (commonly called the Net) is a global

system of interconnected computer networks that use
the standard Internet Protocol Suite (TCP/IP) to serve
billions of users worldwide.
Internet Services
Different services are made available on the Internet

including:
1.Email (electronic mail): for sending and receiving
messages.
2. Usenet (User Network) : accessing newsgroups.
Groups of users who send and read

messages on a particular topic.
Internet Services
3. IRC (Internet relay chat):

Chatting to other users using text messages in real-time
(immediately, while users are logged on to the system)
4. FTP (file transfer protocol):

Copying files between computers on a network.
• Downloading Copying files from a server computer
to a client computer
• Uploading Copying files from a client computer to
a server computer
Internet Services
5. Telnet (teletype network):

Logging on to your local server across a network
communications system at a distance e.g. from
another country.
Connecting to a network system account,
normally using a password
6. MOOs (Multi-user domain that is Object-oriented):
▫ MOOs are network accessible, multi-user, programmable ,
interactive systems well-suited to the construction of text-
based adventure games, conferencing systems, and other
collaborative software.
▫ Is a text-based online virtual reality system to which

multiple users (players) are connected at the same time.
▫ Taking part in simulations in a shared environment. Each

person assumes a persona and communicates using text
messages.
7. WWW (the World Wide Web):
▫ Commonly referred to as the Web.
▫ Contains interlinked documents called webpages.
▫ A website is a set of related webpages stored
together on a server computer.
▫ Browsing means moving from one webpage to
another.
8. Social Networks:
▫ A social network service is an online service, platform, or site that
focuses on building and reflecting of social networks or social
relations among people, e.g., who share interests and/or activities.
E.g. Facebook, MySpace and Twitter,
▫ A social network service essentially consists of a representation of
each user (often a profile), his/her social links, and a variety of
additional services.
▫ Social network services make it possible to connect people who share

interests and activities across political, economic, and geographic
borders.
▫ Facebook launched in 2004, has since become the largest social
networking site in the world.
▫ Twitter set the trend for "real time" services, where users can
broadcast to the world what they are doing, or what is on their
minds within a 140 character limit.
Computer-mediated communication (CMC)
• A term used to describe systems that allow users to
communicate using a computer network.
Asynchronous Synchronous
Participants are not on-line Participants are on-line at the
at the same time and there same time. There may be a
are delays between few seconds delay but the
messages. communication is closer to
face-to-face interaction.
• Examples of asynchronous communication:

▫ Mobile phone text messages.
▫ Emails.
▫ newsgroups/discussion lists.
• Examples of synchronous communication:
• IRC
▫ MOOs.
▫ Audio and videoconferencing.
• Videoconferencing:
a form of communication over a network that uses
video cameras so that the people taking part can see
and hear each other.
• With the exception of videoconferencing, there is

no way to show facial expressions and emotions in
text-based CMC systems.
• To compensate, users have developed a number of
strategies including:
▫ Abbreviations and acronyms. E.g. LOL
▫ Symbols and exclamation marks. E.g Yeeeees!!
▫ Emoticons: symbols indicating emotions. E.g. :
Internet Service Provider (ISP)
• Most users connect to the internet using a modem.
• Modem (modulator-demodulator) is an electronic device that
converts signals to enable a computer to be connected to an
ordinary telephone line thru a server and a router owned by an
ISP (Internet service provider).
• ISP is a company that offers its customers access to the Internet.
• ISPs employ a range of data transmission technologies to enable
customers to connect to the internet, such as dial-up, DSL, cable
modem, satellite Internet access, fiber to the home (FTTH).
• ISP also provide help and support services to its customers.
To attract users to connect through their system, ISPs

offer various options including:
1.Unlimited number of email addresses with filtering of email to

remove Junk email (unwanted email normally advertising or
trying to sell something).
2. Web-based mail allows users to access their email form any

computer with Internet access.
3.POP3 email requires a special email program. It is faster and

more efficient.
4. Unlimited Web space for setting up your own website and

viruses checking facilities for checking your computer files to
detect programs written with the purpose of causing damage
or causing a computer to behave in an unusual way.
Web space file storage space for storing webpage files
Website a set of related pages stored on a server on

the world wide web.

Unit 12

Uploaded by

Copyright:

Available Formats

Unit 12

Uploaded by

Document Information

Original Description:

Original Title

Copyright

Available Formats

Share this document

Share or Embed Document

Sharing Options

Did you find this document useful?

Is this content inappropriate?

Copyright:

Available Formats

Unit 12

Uploaded by

Copyright:

Available Formats

1

The Internet (commonly called the Net) is a global

Different services are made available on the Internet

2. Usenet (User Network) : accessing newsgroups.

Groups of users who send and read

3. IRC (Internet relay chat):

4. FTP (file transfer protocol):

5. Telnet (teletype network):

▫ Is a text-based online virtual reality system to which

▫ Taking part in simulations in a shared environment. Each

▫ Social network services make it possible to connect people who share

• Examples of asynchronous communication:

• With the exception of videoconferencing, there is

To attract users to connect through their system, ISPs

1.Unlimited number of email addresses with filtering of email to

2. Web-based mail allows users to access their email form any

3.POP3 email requires a special email program. It is faster and

4. Unlimited Web space for setting up your own website and

Web space file storage space for storing webpage files

Website a set of related pages stored on a server on

You might also like