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The Web and E-mail. 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. Chapter 7: The Web and E-mail. 2. Web Technology. Web Basics HTML HTTP Web Browsers Cookies Web Page Authoring

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Presentation Transcript
chapter contents
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

Chapter 7: The Web and E-mail

2

web technology
Web Technology

Web Basics

HTML

HTTP

Web Browsers

Cookies

Web Page Authoring

HTML Scripts

Chapter 7: The Web and E-mail

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web basics
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

RSS vs. Atom

Videocasting

Wiki

Web 2.0

Chapter 7: The Web and E-mail

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web basics5
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

Chapter 7: The Web and E-mail

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slide6
HTML

Set of specifications for creating documents that a browser can display as a Web page

Markup language

HTML tags

XHTML

DHTML

Ajax

Chapter 7: The Web and E-mail

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slide7
HTML

Chapter 7: The Web and E-mail

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slide8
HTTP

HTTP messages flow between a browser and a Web server.

Chapter 7: The Web and E-mail

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web browsers
Web Browsers

Help you access Web pages

Upgrade to new browser versions as they become available

Popular browsers:

Internet Explorer

Mozilla Firefox

Apple Safari

Netscape Navigator

Opera

Chapter 7: The Web and E-mail

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web browsers10
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

Chapter 7: The Web and E-mail

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cookies
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

Chapter 7: The Web and E-mail

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web page authoring
Web Page Authoring

Text editor

HTML conversion tool

Online Web authoring tools

Web authoring software

Microsoft FrontPage

Adobe Dreamweaver

Nvu

12

html scripts
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

Chapter 7: The Web and E-mail

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search engines
Search Engines

Search Engine Basics

Formulating Searches

Citing Web-based Source Material

Chapter 7: The Web and E-mail

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search engine basics
Search Engine Basics

A Web search engine is a program designed to help people locate information on the Web by formulating simple keyword queries

Chapter 7: The Web and E-mail

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search engine basics16
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

Chapter 7: The Web and E-mail

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formulating searches
Formulating Searches

Most search engines work with keyword queries in which you enter one or more words, called search terms

Chapter 7: The Web and E-mail

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formulating searches18
Formulating Searches

A Boolean operator is a word or symbol that describes a relationship between keywords, helping you create a more focused query

Chapter 7: The Web and E-mail

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citing web based source
Citing Web-Based Source

To copy a passage of text

from a Web page, highlight

the text, click the Edit

menu, then select Copy.

Next, switch to your own

document and use the

Paste option.

Chapter 7: The Web and E-mail

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citing web based source20
Citing Web-Based Source

Chapter 7: The Web and E-mail

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e commerce
E-commerce

E-commerce Basics

Online Shopping

Online Auctions

Online Payment

Chapter 7: The Web and E-mail

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e commerce basics
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)

Chapter 7: The Web and E-mail

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e commerce basics23
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

Chapter 7: The Web and E-mail

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online shopping
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.

Chapter 7: The Web and E-mail

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online shopping25
Online Shopping

Chapter 7: The Web and E-mail

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shopping carts
Shopping Carts

Chapter 7: The Web and E-mail

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online auctions
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

Chapter 7: The Web and E-mail

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online payment
Online Payment

The most popular ways to make online payments include submitting your credit card number directly to a merchant and using a third-party payment service such as PayPal

Online shoppers are justifiably worried that personal information and credit card numbers supplied in the course of an e-commerce transaction might be hijacked and used inappropriately

Chapter 7: The Web and E-mail

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online payment29
Online Payment

A secure connection encrypts the data transmitted between your computer and a Web site

SSL (Secure Sockets Layer)

TLS (Transport Layer Security)

S-HTTP (secure HTTP)

Chapter 7: The Web and E-mail

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online payment30
Online Payment

Person-to-person payments are an alternative to credit cards

The payment service is the only entity that sees your credit card number

Service is in its infancy

An electronic wallet is software that stores billing and shipping information

Chapter 7: The Web and E-mail

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online payment31
Online Payment

An electronic wallet can transfer your billing and shipping information to a

participating site’s

e-commerce Web server when you check out.

Chapter 7: The Web and E-mail

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e mail
E-mail

E-mail Overview

Netiquette

E-mail Technology

Chapter 7: The Web and E-mail

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e mail overview
E-Mail Overview

Any person with an e-mail account can send and receive e-mail messages

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e mail overview34
E-Mail Overview

Basic e-mail activities

Writing

Reading

Replying

Forwarding

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e mail overview35
E-Mail Overview

E-mail attachments are files that travel with an e-mail message

E-mail software converts e-mail attachments to MIME

HTML-compliant e-mail software

Additional e-mail features

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e mail overview36
E-Mail Overview

Chapter 7: The Web and E-mail

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netiquette
Netiquette

Internet etiquette

Meaningful subject

Use uppercase and lowercase letters

Check spelling

Be careful what you send

Be polite

Be cautious with sarcasm and humor

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netiquette38
Netiquette

Use smileys and text messaging shorthand cautiously

Use the Bcc function for group mailings

Don’t send replies to all recipients

Don’t send huge attachments

Explain attachments

Stay alert for viruses

Notify recipients of viruses

Chapter 7: The Web and E-mail

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e mail technology
E-mail Technology

E-mail systems carry and manipulate e-mail messages

E-mail servers

Based on store-and-forward technology

Three types of e-mail systems widely used today:

POP

IMAP

Web-based e-mail

Chapter 7: The Web and E-mail

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e mail technology40
E-mail Technology

Web-based e-mail accounts allow you to use a browser to access your e-mail messages

Chapter 7: The Web and E-mail

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e mail technology41
E-mail Technology

A POP server is a computer that stores your incoming messages until they can be transferred to your hard disk

E-mail client software

SMTP server

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web and e mail security
Web and E-mail Security

Cookie Exploits

Spam

Phishing

Fake Sites

Chapter 7: The Web and E-mail

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cookie exploits
Cookie Exploits

An ad-serving cookie can track your activities at any site containing banner ads from a third party

Chapter 7: The Web and E-mail

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cookie exploits44
Cookie Exploits

A Flash cookie, also called a local shared object, is the Flash equivalent of a conventional Web cookie

A Web bug or clear GIF is typically a 1x1 pixel graphic embedded in a Web page or e-mail message. It is almost invisible due to its size and is designed to track who’s reading the Web page or e-mail message

Antispyware is a type of security software designed to identify and neutralize Web bugs, ad-serving cookies, and other spyware

Chapter 7: The Web and E-mail

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cookie exploits45
Cookie Exploits

Individuals who prefer not to leave a trail of their Internet activities surf through an anonymous proxy service, which uses an intermediary, or proxy, server to relay Web page requests after masking the originating IP address

Chapter 7: The Web and E-mail

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slide46
Spam

Spam is unwanted electronic junk mail about medical products, low-cost loans, and fake software upgrades that arrives in your online mailbox

A spam filter is a type of utility software that captures unsolicited e-mail messages before they reach your inbox

To combat spam sent by hijacked botnet computers, e-mail authentication techniques, such as Sender ID and DomainKeys, verify that e-mail messages originate from the Internet domain from which they claim to have been sent

Chapter 7: The Web and E-mail

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slide47
Spam

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phishing
Phishing

Phishing is an e-mail based scam designed to persuade you to reveal confidential information, such as your bank account number or Social Security number

If you don’t want to become a phishing victim, be suspicious of e-mail messages that supposedly come from banks, ISPs, online payment services, operating system publishers, and online merchants

Chapter 7: The Web and E-mail

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fake sites
Fake Sites

A fake Web site looks legitimate, but has been created by a third party to be a very clever replica of a legitimate Web site

Pharming is an exploit that redirects users to fake sites by “poisoning” a domain name server with a false IP address

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fake sites50
Fake Sites

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