Chapter 7: The Web and E-mail doc

The Web and E-mail
The Web and E-mail
Chapter 7
Chapter 7
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Chapter 7: The Web and E-mail 2
Chapter Contents

Section A: Web Technology

Section B: Search Engines

Section C: E-commerce

Section D: E-mail

Section E: Web and E-mail Security
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SECTION
A
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Web Technology
Web Technology

Web Basics

HTML

HTTP

Web Browsers


Cookies

Web Page Authoring

HTML Scripts
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Web Basics

The Web is an interlinked collection of
document, image, video, and sound files

A Web site contains a collection of related
information

Podcasts, Videocasts

RSS
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Web Basics

A Web page is the product or output of one or more
Web-based files displayed in a format similar to a
page in a book

A Web browser is client software that displays Web
page elements and handles links between pages


Every Web page has a unique address called a
URL
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HTML

Set of specifications for creating documents
that a browser can display as a Web page
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Markup language
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HTML tags

XHTML

DHTML

Ajax
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HTML
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HTTP
HTTP messages flow
between a browser
and a Web server.
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Web Browsers


Help you access Web pages

Popular browsers:
–
Internet Explorer
–
Mozilla Firefox
–
Apple Safari
–
Opera
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Web Browsers

Helper applications extend browser’s ability
to work with file formats
–
A plug-in is a type of helper application
–
A player is any helper
application or plug-in
that helps a browser
display a particular file
format
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Cookies


Small chunk of data generated by a Web
server and stored on computer’s hard disk
–
Fix problems caused by HTTP’s stateless
protocol
–
Relatively safe

Your computer does not have to accept
cookies
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Web Page Authoring

Text editor

HTML conversion tool

Online Web authoring
tools

Web authoring software
–
Microsoft FrontPage
–
Adobe Dreamweaver
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HTML Scripts


HTML scripts can perform complicated tasks
and respond to user actions
–
HTML forms
–
Server-side script
–
Client-side script
–
Java applet
–
ActiveX control

Digital Certificate
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SECTION
B
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Search Engines
Search Engines

Search Engine Basics

Formulating Searches
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Search Engine Basics

A Web search engine is a program designed
to help people locate information on the Web

by formulating simple keyword queries
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Search Engine Basics

A Web crawler is a computer program that is automated to
methodically visit Web sites

A search engine indexer is software that culls keywords from
a Web page and stores them in a database

A search engine’s query processor looks for your search
terms in search engine’s indexed database and returns list of
relevant Web sites

Link popularity is measured by quantity and quality of links
from one Web page to others

A meta keyword is entered into a header section of a Web
page when it is created and is supposed to describe the
page contents
–
Keyword stuffing
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Formulating Searches

Most search engines
work with keyword
queries in which you

enter one or more
words, called search
terms
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Formulating Searches

A Boolean operator is a word or symbol that
describes a relationship between keywords,
helping you create a more focused query
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SECTION
C
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E-commerce
E-commerce

E-commerce Basics

Online Shopping

Online Auctions

Online Payment
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E-commerce Basics

Business transactions conducted
electronically over a computer

network
–
B2C (business-to-consumer)
–
C2C (consumer-to-consumer)
–
B2B (business-to-business)
–
B2G (business-to-government)
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E-commerce Basics

Enhances traditional business models

Styles of online advertisements
–
Banner ad
–
Hover ad
–
Pop-up ad
•
Click-through rate

Ad-blocking software
prevents ads from
appearing on screens
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Online Shopping
In a typical shopping
session, you connect to
an online storefront and
use navigation controls
to browse through the
merchant’s catalog. As
you browse, you can
drop items into your
electronic shopping cart.
At the checkout counter,
you enter the information
necessary to pay for the
items you selected.
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Online Shopping
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Shopping Carts
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Online Auctions

An online auction is the
electronic equivalent to
good old-fashioned yard
sales, rummage sales, and
auctions


You can expect to bid on
new, used, closeout,
overstock, or refurbished
items at an online auction

Computer software takes
the place of an auctioneer