1 / 50

The Web and E-mail

Chapter 7: The Web and E-mail. 2. Chapter Contents. Section A: Web TechnologySection B: Search EnginesSection C: E-commerceSection D: E-mailSection E: Web and E-mail Security. Chapter 7: The Web and E-mail. 3. Web Technology. Web BasicsHTMLHTTPWeb BrowsersCookiesWeb Page AuthoringHTML Scri

eliza
Download Presentation

The Web and E-mail

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

    1. The Web and E-mail Chapter 7

    2. 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

    3. Chapter 7: The Web and E-mail 3 Web Technology Web Basics HTML HTTP Web Browsers Cookies Web Page Authoring HTML Scripts

    4. Chapter 7: The Web and E-mail 4 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 Figure 7-1Figure 7-1

    5. Chapter 7: The Web and E-mail 5 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 Figure 7-3Figure 7-3

    6. Chapter 7: The Web and E-mail 6 HTML Set of specifications for creating documents that a browser can display as a Web page Markup language HTML tags XHTML DHTML Ajax

    7. Chapter 7: The Web and E-mail 7 HTML Figure 7-4Figure 7-4

    8. Chapter 7: The Web and E-mail 8 HTTP Figure 7-5Figure 7-5

    9. Chapter 7: The Web and E-mail 9 Web Browsers Help you access Web pages Popular browsers: Internet Explorer Mozilla Firefox Apple Safari Opera Figure 7-7Figure 7-7

    10. Chapter 7: The Web and E-mail 10 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 Figure 7-8Figure 7-8

    11. Chapter 7: The Web and E-mail 11 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 Figure 7-9Figure 7-9

    12. Chapter 7: The Web and E-mail 12 Web Page Authoring Text editor HTML conversion tool Online Web authoring tools Web authoring software Microsoft FrontPage Adobe Dreamweaver Figure 7-11Figure 7-11

    13. Chapter 7: The Web and E-mail 13 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 Figure 7-14Figure 7-14

    14. Chapter 7: The Web and E-mail 14 Search Engines Search Engine Basics Formulating Searches

    15. Chapter 7: The Web and E-mail 15 Search Engine Basics A Web search engine is a program designed to help people locate information on the Web by formulating simple keyword queries Figure 7-16Figure 7-16

    16. Chapter 7: The Web and E-mail 16 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

    17. Chapter 7: The Web and E-mail 17 Formulating Searches Most search engines work with keyword queries in which you enter one or more words, called search terms Figure 7-21Figure 7-21

    18. Chapter 7: The Web and E-mail 18 Formulating Searches A Boolean operator is a word or symbol that describes a relationship between keywords, helping you create a more focused query Figure 7-22 Figure 7-22

    19. Chapter 7: The Web and E-mail 19 E-commerce E-commerce Basics Online Shopping Online Auctions Online Payment

    20. Chapter 7: The Web and E-mail 20 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) Figure 7-27Figure 7-27

    21. Chapter 7: The Web and E-mail 21 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 Figure 7-28Figure 7-28

    22. Chapter 7: The Web and E-mail 22 Online Shopping Figure 7-30Figure 7-30

    23. Chapter 7: The Web and E-mail 23 Online Shopping Figure 7-31Figure 7-31

    24. Chapter 7: The Web and E-mail 24 Shopping Carts Figure 7-32Figure 7-32

    25. Chapter 7: The Web and E-mail 25 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 Figure 7-33Figure 7-33

    26. Chapter 7: The Web and E-mail 26 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

    27. Chapter 7: The Web and E-mail 27 Online Payment A secure connection encrypts the data transmitted between your computer and a Web site SSL (Secure Sockets Layer) S-HTTP (secure HTTP) Figure 7-34Figure 7-34

    28. Chapter 7: The Web and E-mail 28 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 Figure 7-35Figure 7-35

    29. Chapter 7: The Web and E-mail 29 Online Payment Figure 7-36Figure 7-36

    30. Chapter 7: The Web and E-mail 30 E-mail E-mail Overview Netiquette E-mail Technology

    31. Chapter 7: The Web and E-mail 31 E-Mail Overview Any person with an e-mail account can send and receive e-mail messages Figure 7-37Figure 7-37

    32. Chapter 7: The Web and E-mail 32 E-Mail Overview Basic e-mail activities Writing Reading Replying Forwarding Figure 7-38Figure 7-38

    33. Chapter 7: The Web and E-mail 33 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

    34. Chapter 7: The Web and E-mail 34 E-Mail Overview Figure 7-41Figure 7-41

    35. Chapter 7: The Web and E-mail 35 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

    36. Chapter 7: The Web and E-mail 36 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 Figure 7-42Figure 7-42

    37. Chapter 7: The Web and E-mail 37 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

    38. Chapter 7: The Web and E-mail 38 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 Figure 7-44Figure 7-44

    39. Chapter 7: The Web and E-mail 39 E-mail Technology Web-based e-mail accounts allow you to use a browser to access your e-mail messages Figure 7-43Figure 7-43

    40. Chapter 7: The Web and E-mail 40 Web and E-mail Security Cookie Exploits Fake Sites Spam Phishing

    41. Chapter 7: The Web and E-mail 41 Cookie Exploits An ad-serving cookie can track your activities at any site containing banner ads from a third party Figure 7-45Figure 7-45

    42. Chapter 7: The Web and E-mail 42 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

    43. Chapter 7: The Web and E-mail 43 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 Figure 7-48Figure 7-48

    44. Chapter 7: The Web and E-mail 44 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 Figure 7-49Figure 7-49

    45. Chapter 7: The Web and E-mail 45 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

    46. Chapter 7: The Web and E-mail 46 Spam Figure 7-51Figure 7-51

    47. Chapter 7: The Web and E-mail 47 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

    48. Chapter 7: The Web and E-mail 48

    49. Chapter 7: The Web and E-mail 49 Phishing Figure 7-52Figure 7-52

    50. Chapter 7 Complete The Web and E-mail

More Related