Exp2003 Int Ppt 01

Internet Explorer and the World Wide Web: Welcome to Cyberspace

1Committed to Shaping the Next Generation of IT Experts.

Internet Explorer and the World Wide Web: Welcome to

Cyberspace

Exploring Microsoft Office


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Define the Internet and give a brief overview of its history

Explain how the World Wide Web differs from the Internet

Describe the structure of a Web address; explain what is meant by “backing up within an address”

Describe the various buttons on the Internet Explorer toolbar

Explain how to return to a Web site; distinguish between the History and Favorites lists

Objectives (1 of 2)


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Objectives (2 of 2) Name three different search engines; explain the

advantage of using multiple engines with the same query

Distinguish between AND, OR, and NOT Download a picture from the Web Discuss several similarities and differences

between e-commerce and traditional commerce Distinguish between the http and https protocols;

define a cookie Create a Web page


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The Internet

The Internet is a worldwide collection of networks connecting millions of computers all over the world.

A server runs software that coordinates information among the other computers or clients

The software on a server is called the network operating system.


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The Internet

The Internet is a worldwide collection of networks connecting millions of computers all over the world.


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The Internet

A Client – a computer that asks for data

A server runs software that coordinates information among the other computers or clients. It receives a request and sends data to the Client.

The software on a server is called the network operating system.


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The Internet and the Worldwide Web


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Accessing the Internet

You can be connected via a direct or always-on connection, or a dial-up connection.


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Dial-up Connection Modem – internal or external

Sender - Converts digital signals from the computer to analog signals for phone lines

Receiver – Converts analog signals to digital Modem or PC cards are inserted into the computers

Data Transfer rate or Throughput is how fast the

data travels between the two modems

Connection Speed


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Advantages of Dial-up Least costly in terms of hardware Least costly in terms of Internet Service

Providers Hard to track for hackers

Disadvantages of Dial-up Speed Can you use your phone line? Electrical Interference


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Direct or always-on connection Digital Subscriber line – DSL Cable Integrated Services Digital Network – ISDN Satellite


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DSL Uses standard phone lines or twisted pair

wiring card One line is used for voice – slower speed Other two lines are used to send and receive

data – from 128 Kbps to 1.5 megabits

Some advantages…Disadvantages of DSL?


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Advantages of DSL Faster?

During peak times of Internet usage, lines are not shared

Can use your phone Hard to track for hackers

Disadvantages of DSL Costly in terms of hardware Costly in terms of installation Quality and speed affected by distance from

the Central Switching Office 18,000 feet


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Cable Uses fiber-optic lines on coaxial cable Transmits data at the speed of light On a network, our workstation has a NIC or

Network Interface card to connect to the Network

Cable also uses a cable modem

Some advantages…Disadvantages of Cable?


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Advantages of Cable Faster – speed of light Can use your phone Availability Less electrical interference Less expensive than DSL


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Disadvantages of Cable Costly in terms of hardware – modem and

NIC card Costly in terms of installation Cost of ISP


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ISDN – Integrated Services Digital Network Uses standard twisted pair or phone lines ISDN modem – does not convert to analog –

uses only digital signals Can use phone separately

Some advantages…Disadvantages of ISDN?


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Advantages of ISDN Twice as fast as dial-up Can use your phone Availability

Disadvantages of ISDN Speed Costly in terms of installation More electrical interference


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Satellite Uses coaxial cable Need a satellite dish – a modem sends data to

the company over standard telephone lines signals

Can use phone separately

Some advantages…Disadvantages of Satellite?


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Advantages of Satellite Can use your phone Availability

Disadvantages of Satellite Speed Costly in terms of installation Affected by weather


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Origins of the Internet

U.S. Defense Department - Concerned about security due to connectivity developed an experimental Wan, called ARPANET. Circuit Switching – still used by most

telephones companies, single line of communication

Packet Switching – messages are sent or routed in packets by computers called routers.


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Electronic Mail - Birth

FTP - File Transfer Protocol. Allowed transmission of files from remote sites

Telnet – allowed users to log on from different locations

Bulletin Boards – Users could collect messages and files from one centralized site


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Internet service providers (ISPs) are the gateway to the Internet. Growth is phenomenal Supply and demand has increased the number

of ISP’s available


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The Internet

A network of networks Began in 1969 as ARPAnet (Advanced

Research Project Agency Network) No central authority and thus impossible to

state the precise size The Internet is not free just because you do

not pay for it – Who pays for it?


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World Wide Web

The World Wide Web is the collection of Web pages accessed through the Internet. The Web is not the Internet!

Computers that host Web pages are called Web servers. Servers are also used to connect Workstations/computers via a network with shared hardware and software.


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Origin of Hypertext or Web Page

HTML - Hypertext Markup Language Programming language A set of code or tags which determine what to

do with pictures and text A Graphic User Interface? Invented by Berners-Lee and Calliau


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Anchor Tags

Real power of HTML Anchor tags allow us to link to other HTML

documents Commonly called hyperlinks or Links


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Links

Hypertext Link Points to another document, picture file or e-

mail address.

[email protected]

www.yahoo.com


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Hypermedia

Click on the picture!


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Examples of Hypertext

HEADINGS (<H#> ... </H#>) Header 1

Header 2 Header 3

Header 4

Header 5

Header 6 SEPARATORS Paragraph Break: <P> Line Break: <BR> Horizontal Rule: <HR>


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Examples of Hypertext - 2

LISTS - UNNUMBERED <UL> <LI> apples <LI> bananas </UL>

apples bananas

NUMBERED or Ordered Lists <OL> <LI> oranges <LI> peaches <LI> grapes

</OL> 1. peaches 2. grapes 3. oranges


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Hyperlinks

The essence of the Web as you click on a link to move to the next document, it may be stored on a different computer

Hyperlinks may contain text, graphics, sound, or video links Blue underlined fonts are unexplored Magenta links have been previously accessed

www.microsoft.com

www.microsoft.com


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The World Wide Web

A subset of the Internet consisting of all computers with hypertext or hypermedia documents

These documents contain references (links) to other documents which may be on a different computer anywhere in the world

Began in 1992 at the European Particle Physics Laboratory (CERN) in Switzerland


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Web Sites

A collection of linked Web pages Start usually with the Home Page All other HTML or Web pages are organized

around the home page


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Connecting to a Web Site

Browsers usually use DOMAIN Name Addressing to locate a Web site

Each site has a Unique Internet Protocol address or IP address

What is the difference between these two addresses?

http://www.cme.com and

http:// 220.87.3204.02 One is a domain name and the other is the IP

address for the same site.


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Domain Name

http://www.cme.com www.cme.com defines the domain name


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Top Domain Name

http://www.cme.com

The last part of the domain name is the top level domain .com here


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Top Level Domain - Examples

.com .edu .net .org


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TOP LEVEL Domain Names

Original Six: .edu (education) .com (commercial) .gov (government) .mil (military) .net (network

administration) .org (non-profit)

New domains: .biz (business) .pro (licensed

professional) .info (information

services) .uk (United Kingdom) .ca (Canada) .au (Australia)


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Transfer Protocols

http://www.cme.com http: defines the transfer protocol

Hypertext transfer protocol Other Transfer Protocols

ftp: telnet https:


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Pathname

http://www.cme.com/prd/overview_FC653.html

Prd/ is the pathname Overview_FC653.html is the filename


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URL

Uniform Resource Locator Transfer Protocol Domain name Pathname Filename


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Examples of URLs

My school: www.miami.edu Exploring Windows: www.prenhall.com/grauer My favorite site:

bestpracticesindiscussionforums.blogspot.com Anti-virus updates: www.symantec.com Download software: www.tucows.com


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Browsers

A Web browser is a program used to view Web pages or view Hypertext Markup Language.

Common browsers Microsoft Internet Explorer Netscape Navigator MSN Explorer America Online


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Acronyms Abound HTTP – HyperText Transfer Protocol is used to

transmit Web documents HTTPS – Secure protocol for confidential

transactions HTML – The language in which all Web

documents are displayed TCP/IP – A suite of protocols that allows

multiple platforms to communicate ISP – Internet Service Provider


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The Exploring Office Web Site

Web address (or URL)

Internet Explorer is the browser

HTTP protocol


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Menu Bar File Edit View Favorites Tools Help

Address Bar URL

Toolbar Back Button Forward Button Stop Refresh Home Search Favorites History

Microsoft Internet Explorer


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The Web is always changingAddress bar (address is constant,

but the content changes)

Hyperlinks

Print button


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A program that systematically searches the Web for documents on a specific topic

Uses a key word or words as a query, A Query is a word or phrase, was returns information from a database.

Several search engines are available Each search engine has its own database No search engine is best Uses Boolean (logical) operators Returns “hits” or documents once search has

been submitted

Search Engines


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Suggestions for Searching

Use the Search button on the Internet Explorer Toolbar

Try multiple search engines on one query Be aware of logical operators - AND, OR, and

NOT Be specific on your Search: e.g., “Eleanor

Roosevelt ” rather than “first ladies” Set as few Bookmarks/Favorites as you can!


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Popular Web Search Engines

http://www.altavista.com/ http://www.msn.com/

http://www.go.com/ http://www.excite.com/

http://www.lycos.com http://www.askjeeves.com/

http://www.webcrawler.com/ http://www.google.com/

http://www.yahoo.com http://www.search.com/


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Search Rules and Techniques

Specify Boolean operators And - Includes all findings of both key words Or - Looks for only one of the specified key words Not - Allows you to exclude certain key words

Use multiple search engines Read online help about search criteria used

for a particular search engine


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Copyright Protection A copyright provides legal protection to a

written or artistic work, give the author exclusive rights to its use and distribution

Exceptions Public domain or Fair use exclusion

Credit your sources Insert Footnote command

Infringement of copyright Software piracy Downloading music illegally


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Web Site and Saving an Image

Choose Save Picture As command

Right click picture for context-sensitive menu


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E-commerce

The exchange of goods and services Buyer and seller Products and suppliers A place to “meet” Marketing to attract the buyer Accept and process the order

All of these elements are present in e-commerce and traditional commerce


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Advantages of E-commerce

For the Seller Open 24/7 Shoppers from

anywhere Virtual inventory is

cheaper and extensive Lower transaction

costs Target your customers

For the Buyer Open 24/7 Never leave home Easy to view and

explore product line Comparison shop Web site knows you


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Security and Privacy

Secure transactions https protocol Encryption

Privacy Cookie is a small file written to your disk each

time you visit a site Problem is when one site can read many cookies,

e.g., DoubleClick.com


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Returning to a Previous Site

History folder

Favorites folder


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Organize Favorites

Move a favorite

Create a new folder

Delete a favorite

Rename a favorite


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A Simple Web Page

Hyperlinks


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The Source Code

Anchor tags

Paragraph tags


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Microsoft Word

Formatted text

Hyperlinks

Insert hyperlink button

Graphic image


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Simple Text

Bullets button

Type your text


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Save As a Web Page

File name

File type


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Create your own Webpage

You can create your own Web Page by using Word!

Exp2003 Int Ppt 01

Technology

Transcript of Exp2003 Int Ppt 01