citw internet & www

7/27/2019 Citw Internet & Www

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Computing and IT in the WorkplaceCT006-1

Internet & The World Wide Web


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CT006-1 Computing And IT in the Workplace Chapter 1 2

Learning Outcomes

At the end of this section,YOU should be able to:

To describe the evolution and development of the Internet

To discuss and explain some of the common usage of Internet in modern

society


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Topics we will cover

The Internet

History of the Internet

The World Wide Web

E-Commerce

Other Internet Services


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What is the Internet?

Worldwide collection of networks that connects

millions of computers


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Why do users access the Internet?

Information

Shopping

Banking and Investing

Classes

Entertainment

Communications


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The History of Internet

Goal:

To function if

part of network

were disabled

Becamefunctional

September 1969

ARPANET

Networking project by

Pentagons Advanced

Research Projects

Agency (ARPA)

Goal:

To allow scientists

at different

locations to share

information


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How has the Internet grown?

Today

More than 150 million host nodes

1984

More than 1,000 host nodes

1969Four host nodes



Who controls the Internet?

World Wide Web

Consortium (W3C)

Oversees research, sets

standards and guidelines Tim Berners-Lee, director

Internet2 (I2)

Internet-related research and

development project

Develops and tests advancedInternet technologies

No oneccit is a public, cooperative, and

independent network

Several organizations set standards




How the Internet Works

High-speed

connection

Slow-speed

technology

Dial-up accessmodem in yourcomputer uses a

standard telephone lineto connect to the Internet

Digital subscriber line (DSL),

cable telephone Internet

services (CATV), cable modem

provide connections using

regular copper telephone lines

Connection is always on

whenever the computer

is running

Connection must be established

each time you log on.

Slow but inexpensive

How can you connect to the Internet?




What are ways to access the Internet? ISP, Regional

or National

OSP (AOL and

MSN, for example)

Wireless Internet

Service Provider



How might data travel the Internet using atelephone line connection?




What is a domain name?

Number that uniquely identifies

each computer or device

connected to Internet




Chat

(4)

(1)

E-mail

(2)

Web

(3)

File transfer

(5)

Message board

(6)

Instant messaging

What are some services found on the

Internet?



What is the World Wide Web (WWW)?

A worldwide collection of electronic documents

Each electronic document is called a Web page

Also called the Web

Can contain text, graphics, sound, video, and built-in connections

A Web site is a collection of related Web pages



World Wide Web

What is a Web browser?

Microsoft

Internet

Explorer Netscape

Mozilla

Program that allows you to view Web pages



World Wide Web

How can you establish a connection and start theWeb browser?

Step 2.

If necessary,connect to the

Internet

Step 3.Connection to the

Internet occurs, and a

home page displays

Step 1.Click the Web browser

program name



World Wide Web

What is a home page?

The first page that a Web site presents

Often provides connections to other Web pages



World Wide Web

The process of a computer receiving information

Depending upon connection speed, downloading can

take from a few seconds to several minutes

What is downloading?


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World Wide Web

What is a URL? Unique address for aWeb page

A web serverdelivers

the Web page to yourcomputer


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World Wide Web

What is a hyperlink (link)?

Item found elsewhere

on same Web page

Different Web page

at same Web site

Web page at a different

Web site


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World Wide Web

What is a search engine?

Program used to find Web sites and Web pages by

entering words or phrases called search text

Also known as keywords


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Electronic Commerce

Business to business (B2B)Business providing goods and

services to other businesses

Consumer to consumer (C2C)One consumer sells directly to another

What is e-commerce?

Business to consumer (B2C)Sale of goods to general public

Short for electronic commerce

Business transaction that occurs over

the Internet


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What is e-mail? Short for electronic mail The transmission of messages and files via a

computer network Messages can consist of simple text or can contain

attachments, such as documents, graphics, or audio/videoclips

Internet access providers usually provide an e-mailprogram

Some Web sitessuch as MSN Hotmail and Yahoo!

provide free e-mail services One of the original services on the Internet


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How do you send an e-mail message?

Step 1.Start an e-mail

program

(Microsoft

Outlook, for

example)

Step 2.Click the New Mail Message button

Step 3.Enter the recipients

e-mail address, the

subject, and the

message

Step 4.Click the Insert file button if

you want to attach a picture, for

example, and click Send

Step 5.The recipient opens the

message


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What is an e-mail address? Unique name that consists of a user name and

domain name that identifies the user


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How does an e-mail message travel?

Step 1.Using e-mail

software, you

create and send

message

Step 2.Your software

contacts software

on your ISPs

outgoing mail

server

Step 4.When recipient uses

e-mail software to check

for e-mail messages, the

message transfers fromincoming mail server to

recipients computer

Step 3.Software on outgoing mail server

determines best route for data and sends

message, which travels along Internetrouters to recipients incoming mail server


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What is a mailing list? Group of e-mail

addresses given a singlename

When a message is sent

to the mailing list,everyone on the listreceives the message

To add your name to a mailinglist you must subscribe to it; toremove your name you mustunsubscribe


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What is FTP?

File TransferProtocolInternet standard that allows

you to upload and download files with other

computers on the Internet


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What are newsgroupsandmessage boards? Newsgroup

Many Web sitesuse message

boards because

they are easier to

use

Message board

Online area where users discuss a particular

subject


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What is a chat? Real-time typed conversation

that takes place on a computer

Chat room is location on

server that permits users

to discuss topics of interest


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What is instant messaging (IM)?

Step 2.The server determines if any of your

established friends, family, or

coworkers, calledbuddies

, are online

Step 3.You send instant

messages to anonline buddy

Step 1.

Login to the IMserver

IM Server

Step 4.Your Instant Message travels

through a messaging server and

then to the online buddy

messaging Server

A real-time Internet communications service that notifies you whenone or more people are online and allows you to exchange

messages or files


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Internet Benefits to Organizations

Connectivity and Global Reach

Reduced Communication Cost

Lower Transaction Cost

Reduced Agency Cost

Interactivity, Flexibility and Customization

Accelerated Distribution of Knowledge


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What is a mailing list? Group of e-mail

addresses given a singlename

When a message is sent

to the mailing list,everyone on the listreceives the message

To add your name to a mailinglist you must subscribe to it; toremove your name you mustunsubscribe


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Review Questions

The Internet has had tremendous impact onbusiness. Explain the benefits and relate it to thecase study given.

Explain the types of web sites available.

Explain the processes involved in sending out anInstant message.


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Q & A

Question and Answer Session


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Topic and Structure of next session

Human Aspects of Computing

What we will cover next


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Assignment

Internet has changed the way we live today.

Justify this topic by a short write up, not more than 2 pages providing valid

references to support your views.

Your write up should have

1. Introduction

2. Main content

3. Conclusion

4. References / Bibliography

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