01. Internet (Disc. Computer Chapter 2).pptx

7/30/2019 01. Internet (Disc. Computer Chapter 2).pptx

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Living in a Digital World

Discovering

Computers 2010


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The Internet

The Internet is a worldwide collection of networks

that links millions of businesses, government

agencies, educational institutions, and individuals

Discovering Computers 2010: Living in a Digital World

Chapter 22Page 74

Figure 2-1


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Evolution of the Internet

The Internet originated as ARPANET in September

1969 and had two main goals:


Chapter 23Page 75

Allow scientists atdifferent physicallocations to share

information and work

together

Function even if part ofthe network were

disabled or destroyedby a disaster


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1969ARPANETbecomes

functional

1984ARPANET has

more than1,000

individualcomputerslinked as

hosts

1986 NSFconnectsNSFnet to

ARPANET andbecomes

known as theInternet

1995 NSFNetterminates

its networkon the

Internet andresumesstatus asresearchnetwork

1996Internet2 is

founded

Today Morethan 550

million hostsconnect to

the Internet


Chapter 24Pages 75 - 76


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Many home and small business users connect to

the Internet via high-speed broadband Internet

service


Chapter 25Page 76

CableInternet

service

DSL

Fiber tothe

Premises(FTTP)

Fixed

wireless

CellularRadio

Network

Wi-Fi

SatelliteInternet

Service


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An access provideris a business that provides individuals

and organizations access to the Internet free or for a fee


Chapter 26Page 77

Figure 2-2


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ISP(Internetserviceprovider)

Regional ISPs provide

Internet access to aspecific geographical

area

National ISPs provideInternet access in

cities and townsnationwide

Online service

provider (OSP)

Has many members-only features

Popular OSPs includeAOL (America Online)

and MSN (MicrosoftNetwork)

Wireless Internet

service provider

(WISP)

Provides wireless

Internet access tocomputers andmobile devices

May require a

wireless modem


Chapter 27Page 78

Click to view Web Link,click Chapter 2, Click WebLink from left navigation,then click Wireless Modemsbelow Chapter 2
http://www.scsite.com/dc2010cp/ch2/weblink/


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Chapter 28Page 79

Figure 2-3


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An IP addressis a number that uniquely identifies each

computer or device connected to the Internet

A domain nameis the text version of an IP address

Top-level domain (TLD)

A DNS servertranslates the domain name into its

associated IP address


Chapter 29Pages 79 80

Figure 2-4


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Chapter 210Page 80

Figure 2-5


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The World Wide Web

The World Wide Web, or Web, consists of aworldwide collection of electronic documents(Web pages)

A Web siteis a collection of related Web pagesand associated items

A Web serveris a computer that delivers

requested Web pages to your computer Web 2.0refers to Web sites that provide a means

for users to interact




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The World Wide Web

A Web browser, or browser, allows users to

access Web pages and Web 2.0 programs


Chapter 212Page 81

InternetExplorer

Firefox Opera

Safari GoogleChrome


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The World Wide Web


Chapter 213Page 81

Figure 2-6


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The World Wide Web

A home page is the first

page that a Web site

displays

Web pages provide links to

other related Web pages

Surfing the Web

Downloading is the

process of receivinginformation



Figure 2-7

Some Web pages are

designed specifically for

microbrowsers

Click to view Web Link,click Chapter 2, Click WebLink from left navigation,then click iPhonebelow Chapter 2


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The World Wide Web

A Web page has a unique address called a URL or

Web address



Figure 2-8


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The World Wide Web

Two types of search tools are search engines and

subject directories


Chapter 216Page 85

Searchengine

Finds informationrelated to a

specific topic

Subjectdirectory

Classifies Webpages in an

organized set ofcategories


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The World Wide Web


Chapter 217Page 85

Figure 2-10


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The World Wide Web

A search engine is helpful in locating items such

as:


Chapter 218Page 85

Images Videos Audio News

MapsPeople or

Businesses Blogs


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The World Wide Web

Search operators can help to refine your search


Chapter 219Page 87

Figure 2-13


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The World Wide Web

There are thirteen types of Web sites



Figure 2-15

Portal News Informational Business/Marketing

Blog Wiki Online Social

Network

Educational


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The World Wide Web

Entertainment Advocacy WebApplication

ContentAggregator

Personal



Figure 2-15


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The World Wide Web

Information presented

on the Web must be

evaluated for accuracy

No one oversees thecontent of Web pages


Chapter 222Page 92

Figure 2-16


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The World Wide Web

Multimedia refers to any application that

combines text with:


Chapter 223Page 92


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Other Internet Services

E-mailis the

transmission of

messages and files via a

computer network An e-mail program

allows you to create,

send, receive, forward,

store, print, and deletee-mail messages


Chapter 224Page 101

Figure 2-26


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Chapter 225Page 102

Figure 2-27


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A mailing listis a group of e-mail names and addresses

given a single name

Subscribing adds your e-mail name and address

Unsubscribing removes your name


Chapter 226Page 103

Figure 2-28

Click to view Web Link,click Chapter 2, Click WebLink from left navigation,then click E-Mail belowChapter 2


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Instant messaging (IM) is a real-time Internet

communications service


Chapter 227Page 104

Figure 2-29


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A chat is a real-time

typed conversation that

takes place on a

computer A chat roomis a

location on an Internet

server that permits

users to chat with eachother


Chapter 228Page 105

Figure 2-30

Click to view Web Link,click Chapter 2, Click WebLink from left navigation,then click Chat Roomsbelow Chapter 2


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VoIP (Voice over IP)

enables users to speak

to other users over the

Internet Also called Internet

telephony


Chapter 229Page 106

Figure 2-31


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A newsgroup is an

online area in which

users have written

discussions about aparticular subject

Typically requires a

newsreader

A message boardis aWeb-based type of

discussion group


Chapter 230Page 107

Figure 2-32


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FTP (File Transfer Protocol) is an Internet standard

that permits file uploading and downloading with

other computers on the Internet

Many operating systems include FTP capabilities

An FTP server is a computer that allows users to

upload and/or download files using FTP

Discovering Computers 2010: Living in a Digital World 31Page 107

Click to view Web Link,click Chapter 2, Click WebLink from left navigation,then click FTPbelow Chapter 2

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01. Internet (Disc. Computer Chapter 2).pptx