The Internet

and World Wide Web

Communications

What are computer communications?

p. 460 Fig. 9-1

Process in which two or more computers or devices transfer data, instructions, and information

Networks

What is a network?

p. 469 Fig. 9-9

Collection of computers and devices connected via communications devices and transmissionmedia

The Internet

What are some services found on the Internet?

p. 68-69 Fig. 2-1

The Internet

The Internet is a worldwide collection of networks that links millions of businesses, government agencies, educational institutions, and individuals

History of the Internet

How did the Internet originate?

p. 69

Goal:To function if

part of network were disabled

Became functional

September 1969

ARPANET

Networking project by Pentagon’s Advanced

Research Projects Agency (ARPA)Goal:

To allow scientists at different

locations to share information

History of the Internet

How has the Internet grown?

p. 69

TodayMore than one billion host nodes

1984More than 1,000 host nodes

1969Four host nodes

Internet Hosts

History of the Internet

Who controls the Internet?

p. 70

World Wide Web Consortium (W3C) Oversees research, sets standards and guidelines

Mission is to contribute to the growth of the Web

Nearly 400 organizations around the world are members of the W3C

t

No onec—cit is a public, cooperative, andindependent network

Several organizations set standards

Click to view Web Link,click Chapter 2, Click Web Linkfrom left navigation, then click W3Cbelow Chapter 2

Uses of Computer CommunicationsWhat are wireless Internet access points and cybercafés?

p. 464-465 Fig. 9-4

Wireless Internet access point allows wireless connection to Internet in public location

3G network Cybercafé is coffee

house that provides computers with Internet access

How the Internet Works

What is a domain name?

p. 73 - 74 Figs. 2-4 – 2-5

Text version of Internet protocol (IP) addressNumber that uniquely identifies each computer or device connected to Internet

The World Wide Web

p. 75

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, audio, video, and built-in connections

A Web site is a collection of related Web pages

The World Wide Web

What is a Web browser?

p. 75

MicrosoftInternetExplorer

NetscapeFirefox

Program that allows you to view Web pages

Opera Safari

The World Wide Web

What is a search engine?

p. 78 – 80 Fig. 2-10

Program used to find Web sites and Web pages by entering words or phrases called search text

Also called a keyword

The World Wide Web

There are thirteen types of Web sites

Portal News Informational

Business/Marketing Blog

Wiki Online Social Network Educational

The World Wide Web

Entertainment Advocacy Web Application

Content Aggregator Personal

The World Wide Web

What are the guidelines for evaluating the value of a Web site?

p. 84 Fig. 2-15 t

Affiliation Audience Authority Content

Currency Design Objectivity

Netiquette

What is netiquette?

p. 100

Golden Rule: Treat others as you would like them to treat you.

Code of acceptable behaviors users should follow while on the Internet

First Web Page