Chapter 2 The Internet and World Wide Web
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1 Chapter 2 The Internet and World Wide Web
2 Chapter 2 Objectives Discuss the history of the Internet Describe the types of Web sites Explain how to access and connect to the Internet Recognize how Web pages use graphics, animation, audio, video, virtual reality, and plug-ins Analyze an IP address Identify the steps required for Web publishing Identify the components of a Web address Describe the types of e-commerce Explain the purpose of a Web browser Explain how , FTP, newsgroups and message boards, mailing lists, chat rooms, Instant messaging, and Internet telephony work Search for information on the Web Identify the rules of netiquette Next
3 The Internet What are some services found on the Internet? p. 68 Fig. 2-1 Next
4 History of the Internet How did the Internet originate? Goal: To allow scientists at different locations to share information ARPANET Networking project by Pentagon s Advanced Research Projects Agency (ARPA) Became functional September 1969 Goal: To function if part of network were disabled p. 69 Next
5 History of the Internet How has the Internet grown? Today More than 200 million host nodes 1984 More than 1,000 host nodes 1969 Four host nodes p. 69 Next
6 History of the Internet Who controls the Internet? No onec cit is a public, cooperative, and independent network Several organizations set standards World Wide Web Consortium (W3C) Oversees research, sets standards and guidelines Tim Berners-Lee, director Internet2 (I2) Internet-related research and development project Develops and tests advanced Internet technologies p. 70 Next
7 How the Internet Works How can you connect to the Internet? Slow-speed technology Dial-up access modem in your computer uses a standard telephone line to connect to the Internet High-speed connection Digital subscriber line (DSL), cable telephone Internet services (CATV), cable modem, fixed wireless, and satellite modems Connection must be established each time you log on. Slow but inexpensive Connection is always on whenever the computer is running p. 70 Next
8 Video: Choosing a Broadband Provider Choose the broadband connection that will best meet your Internet connection needs low quality (click to start) high quality (click to start) Next
9 How the Internet Works What are ways to access the Internet? 1. ISP, Regional or National 2. OSP (AOL and MSN, for example) 3. Wireless Internet Service Provider p Fig. 2-2 Next
10 How the Internet Works How might data travel the Internet using a cable modem connection? p. 73 Fig. 2-3 Next
11 How the Internet Works What is a domain name? Text version of Internet protocol (IP) address Number that uniquely identifies each computer or device connected to Internet p. 73 Figs Next
12 What is the World Wide Web (WWW)? A worldwide collection of electronic documents Also called the Web Each electronic document is called a Web page Can contain text, graphics, sound, video, and built-in connections A Web site is a collection of related Web pages p. 75 Next
13 What is a Web browser? Program that allows you to view Web pages Microsoft Internet Explorer Netscape Safari Mozilla Opera p. 75 Next
14 How does a Web browser display a home page? Step 2. If necessary, connect to the Internet Step 1. Click the Web browser program name Step 3. Connection to the Internet occurs, and a home page displays p. 75 Fig. 2-6 Next
15 What is a home page? The first page that a Web site presents Often provides connections to other Web pages p. 76 Fig.2-1a Next
16 How do handheld computers and cellular telephones access the Web? Use a microbrowser that displays Web pages that contain mostly text Must be Web-enabled p. 76 Fig. 2-7 Next
17 What is downloading? The process of a computer receiving information Depending upon connection speed, downloading can take from a few seconds to several minutes p. 76 Next
18 What is a URL? Unique address for a Web page A web server delivers the Web page to your computer Click to view Web Link, click Chapter 2, Click Web Link from left navigation, then click Web Addresses below Chapter 2 p. 76 Fig. 2-8 Next
19 What is a link? Built-in connection to another related Web page location Item found elsewhere on same Web page Different Web page at same Web site Web page at a different Web site p. 77 Next
20 How can you recognize links? Pointer changes to a small hand when you point to a link A link can be text or an image Text links are usually underlined and in a different color p. 77 Fig. 2-9 Next
21 What is a subject directory? Search tool with organized set of topics and subtopics Lets you find information by clicking links rather than entering keywords p Fig Next
22 What is a search engine? Program used to find Web sites and Web pages by entering words or phrases called search text Also called a keyword p. 80 Next
23 What is a hit? Any Web site name that is listed as the result of a search Step 2. Select type of search you want to run Step 1. Go to search engine Step 3. View hits Step 4. Click link to view Web site p. 80 Fig Next
24 The World Wide Web What are the nine basic types of Web sites? Portal News Informational Business/Marketing Educational Entertainment Advocacy Blog Personal p Fig Next
25 What is a portal? A Web site that offers a variety of services from one, convenient location, usually for free Searching, sports, , news, weather, auctions, Web communities (Web sites that join people with similar interests) p. 82 Fig. 2-14a Next
26 What is a news Web site? Contains newsworthy material Stories and articles relating to current events, life, money, sports, and the weather p. 82 Fig. 2-14b Next
27 What is an informational Web site? Contains factual information Created by organizations and government agencies p. 82 Fig. 2-14c Next
28 What is a business/marketing Web site? Contains content that promotes products or services Allows you to purchase products or services online p. 82 Fig. 2-14d Next
29 What is an educational Web site? Offers avenues for formal and informal teaching and learning Some companies offer online training for employees Some colleges offer online classes and degrees p. 82 Fig. 2-14e Next
30 What is an entertainment Web site? Offers an interactive and engaging environment featuring music, video, sports, games, and more p. 84 Fig. 2-14f Next
31 What is an advocacy Web site? Contains content that describes a cause, opinion, or idea p. 84 Fig. 2-14g Next
32 What is a blog? Uses a regularly updated journal format to reflect the interests, opinions, and personalities of the author and sometimes site visitors p. 84 Fig. 2-14h Next
33 What is a personal Web site? Web page maintained by private individual Reasons: sharing life experience with the world or job hunting p. 84 Fig. 2-14i Next
34 What are the guidelines for evaluating the value of a Web site? Affiliation Audience Authority Content Currency Design Objectivity p. 84 Fig Next
35 What is multimedia? Application integrating text with other media elements Graphics Animation Audio Video Virtual reality p. 85 Fig Next
36 What graphics formats are used on the Web? BMP JPEG (pronounced JAY-peg) PNG (pronounced ping) GIF (pronounced JIFF) TIFF p. 85 Fig Next
37 What is a thumbnail? Small version of a larger graphicc used to improve Web page display time Usually click on thumbnail to display larger graphic p. 86 Fig Next
38 What is animation? Appearance of motion created by displaying a series of still images in sequence p. 86 Next
39 What is audio? Music, speech, or any other sound Individual compressed sound files that you download from the Web to your computer Common Web audio file formats are AA, AAC, AIFF, ASF, MP3, WAV, WMA, RA, and QT Once downloaded, you can play (listen to) the contents of the files p. 86 Fig Next
40 What is streaming audio? The process of transferring audio in a continuous and even flow Enables you to listen to music as it downloads to your computer Click to view Web Link, click Chapter 2, Click Web Link from left navigation, then click Streaming Media below Chapter 2 p. 86 Next
41 What is video? Consists of full-motion images that are played back at various speeds MPEG (Moving Pictures Experts Group) is popular video compression standard p. 88 Fig Next
42 What is virtual reality (VR)? Use of computers to simulate real or imagined environment Appears as a three dimensional (3-D) space Used for games and many practical applications p. 88 Fig Next
43 What are plug-ins? Programs that extend the capability of a browser You can download many plug-ins at no cost from various Web sites Click to view Web Link, click Chapter 2, Click Web Link from left navigation, then click Plug-Ins below Chapter 2 p. 89 Fig Next
44 Web Publishing What is Web publishing? Development and maintenance of Web pages Step 1. Plan the Web site Step 2. Analyze and design the Web site Step 5. Maintain the Web site Step 3. Create the Web site Step 4. Deploy the Web site p. 89 Fig Next
45 E-Commerce What is E-commerce? Short for electronic commerce Business transaction that occurs over the Internet Business to consumer (B2C) Sale of goods to general public Click to view Web Link, click Chapter 2, Click Web Link from left navigation, then click E-Commerce below Chapter 2 Consumer to consumer (C2C) One consumer sells directly to another Business to business (B2B) Business providing goods and services to other businesses p. 91 Fig Next
46 Other Internet Services What is ? Short for electronic mail The transmission of messages and files via a computer network Messages can consist of simple text or can contain attachments, such as documents, graphics, or audio/video clips Internet access providers usually provide an program Some Web sites such as MSN Hotmail and Yahoo! provide free services One of the original services on the Internet Click to view Web Link, click Chapter 2, Click Web Link from left navigation, then click below Chapter 2 p Next
47 Video: Basics Learn how to use quickly and efficiently low quality (click to start) high quality (click to start) Next
48 Other Internet Services How do you send an message? Step 1. Start an program (Microsoft Outlook, for example) Step 2. Click the New Mail Message button Step 3. Enter the recipient s address, the subject, and the message Step 5. The recipient opens the message p. 93 Fig Step 4. Click the Insert file button if you want to attach a picture, for example, and click Send Next
49 Other Internet Services What is an address? Unique name that consists of a user name and domain name that identifies the user p. 94 Fig Next
50 Other Internet Services How does an message travel? Step 1. Using software, you create and send message Step 2. Your software contacts software on your ISP s outgoing mail server Step 4. When recipient uses software to check for messages, the message transfers from incoming mail server to recipient s computer Step 3. Software on outgoing mail server determines best route for data and sends message, which travels along Internet routers to recipient s incoming mail server p. 95 Fig Next
51 Other Internet Services What is FTP? File Transfer Protocol Internet standard that allows you to upload and download files with other computers on the Internet Click to view Web Link, click Chapter 2, Click Web Link from left navigation, then click FTP below Chapter 2 p. 96 Fig Next
52 Other Internet Services What are newsgroups and message boards? Newsgroup Online area where users discuss a particular subject Message board Type of discussion group Many Web sites use message boards because they are easier to use Click to view Web Link, click Chapter 2, Click Web Link from left navigation, then click Newsgroups and Message Boards below Chapter 2 p. 95 Fig Next
53 Other Internet Services What is a mailing list? Group of addresses given a single name When a message is sent to the mailing list, everyone on the list receives the message To add your name to a mailing list you must subscribe to it; to remove your name you must unsubscribe Click to view Web Link, click Chapter 2, Click Web Link from left navigation, then click Mailing Lists below Chapter 2 p. 97 Fig Next
54 Other Internet Services What is a chat? Real-time typed conversation that takes place on a computer Chat room is location on server that permits users to discuss topics of interest Click to view Web Link, click Chapter 2, Click Web Link from left navigation, then click Chat Rooms below Chapter 2 p. 98 Fig Next
55 Other Internet Services What is instant messaging (IM)? A real-time Internet communications service that notifies you when one or more people are online and allows you to exchange messages or files Step 1. Login to the IM server Step 2. The server determines if any of your established friends, family, or coworkers, called buddies, are online IM Server messaging Server Step 3. You send instant messages to an online buddy Click to view Web Link, click Chapter 2, Click Web Link from left navigation, then click Instant Messaging below Chapter 2 Step 4. Your Instant Message travels through a messaging server and then to the online buddy p. 98 Fig Next
56 Other Internet Services What is internet telephony? Enables users to speak to other users over the Internet using their computer p. 99 Fig Next
57 Netiquette What is netiquette? Code of acceptable behaviors users should follow while on the Internet Golden Rule: Treat others as you would like them to treat you. p. 100 Next
58 Summary of the Internet and World Wide Web History and structure of the Internet Electronic commerce The World Wide Web Other Internet services Web Publishing Netiquette Chapter 2 Complete
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