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Chapter 2 p. 6 WWW.PALINFONET.COM. The Internet What are some services found on the Internet? p. 68 Fig. 2-1 Next 4. Chat (4) (1) 1. E-mail (2) 2. Web.

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Presentation on theme: "Chapter 2 p. 6 WWW.PALINFONET.COM. The Internet What are some services found on the Internet? p. 68 Fig. 2-1 Next 4. Chat (4) (1) 1. E-mail (2) 2. Web."— Presentation transcript:

1 Chapter 2 p. 6

2 The Internet What are some services found on the Internet? p. 68 Fig. 2-1 Next 4. Chat (4) (1) 1. (2) 2. Web (3) 3. File transfer (5) 5. Message board (6) 6. Instant messaging

3 History of the Internet Who controls the Internet? p. 70 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 Next No one c c it is a public, cooperative, and independent network Several organizations set standards

4 High-speed connection Slow-speed technology How the Internet Works How can you connect to the Internet? p. 70 Next Dial-up access modem in your computer uses a standard telephone line to connect to the Internet Digital subscriber line (DSL), cable telephone Internet services (CATV), cable modem provide connections using regular copper telephone lines Connection is always on whenever the computer is running Connection must be established each time you log on. Slow but inexpensive

5 How the Internet Works What are ways to access the Internet? p. 72 Fig. 2-2 Next 1. ISP, Regional or National 2. OSP (AOL and MSN, for example) 3. Wireless Internet Service Provider

6 How the Internet Works How might data travel the Internet using a telephone line connection? p. 73 Fig. 2-3 Next Step 1. Request data from a server on Internet Step 5. Regional ISP uses leased lines to send data to a national ISP Step 6. National ISP routes data across the country Step 8. Server sends data back to you Step 2. Modem converts digital signals to analog signals Step 3. Data travels through telephone lines to a local ISP Step 4. Data passes through routers Step 7. National ISP passes data to local ISP

7 How the Internet Works What is a domain name? p. 74 Figs. 2-4 – 2-5 Next Text version of Internet protocol (IP) address Number that uniquely identifies each computer or device connected to Internet

8 The World Wide Web What is a Web browser? p. 75 Next Microsoft Internet Explorer Netscape Mozilla Program that allows you to view Web pages

9 The World Wide Web What is downloading? p. 76 Next The process of a computer receiving information Depending upon connection speed, downloading can take from a few seconds to several minutes

10 The World Wide Web What is a URL? p. 76 Fig. 2-8 Click to view Web Link, click Chapter 2, Click Web Link from left navigation, then click Web Addresses below Chapter 2 Next Unique address for a Web page A web server delivers the Web page to your computer

11 The World Wide Web What is a hyperlink (link)? p. 77 Next Item found elsewhere on same Web page Different Web page at same Web site Web page at a different Web site Built-in connection to another related Web page location Click to view animation

12 The World Wide Web What is a search engine? p. 78 Fig Next Program used to find Web sites and Web pages by entering words or phrases called search text Also called a keyword

13 The World Wide Web What is a subject directory? p. 80 Fig Next Search tool with organized set of topics and subtopics Lets you find information by clicking links rather than entering keywords

14 The World Wide Web What are the eight basic types of Web sites? p. 80 Fig Portal News Informational Business/marketing Educational Entertainment Advocacy Personal Next

15 The World Wide Web What is multimedia? p. 83 Fig Next Application integrating text with other media elements Graphics Animation Audio Video Virtual reality

16 The World Wide Web What graphics formats are used on the Web? p. 84 Fig Next BMP GIF (pronounced JIFF) JPEG (pronounced JAY-peg) PCX PNG (pronounced ping) TIFF

17 The World Wide Web What is animation? p. 85 Next Appearance of motion created by displaying a series of still images in sequence

18 The World Wide Web What is audio? p. 86 Fig Next 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 MP3, WAV, WMA (Windows Media Audio), MPEG, RealAudio, and QuickTime Once downloaded, you can play (listen to) the contents of the files

19 The World Wide Web What is streaming audio? p. 87 Fig Next Transfers data in a continuous and even flow Enables you to listen to the sound as it downloads to your computer Radio stations use streaming audio to broadcast over the Web Click to view Web Link, click Chapter 2, Click Web Link from left navigation, then click Streaming Media below Chapter 2

20 The World Wide Web What is video? p. 88 Fig Next Consists of full-motion images with sound played back at various speeds MPEG (Moving Pictures Experts Group) is popular video compression standard

21 The World Wide Web What is virtual reality (VR)? p. 88 Fig Next Use of computers to simulate real or imagined environment Appears as a three dimensional (3-D) space Used for games and many practical applications

22 The World Wide Web What are plug-ins? p. 89 Fig Next 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

23 Business to business (B2B) Business providing goods and services to other businesses Consumer to consumer (C2C) One consumer sells directly to another Electronic Commerce What is e-commerce? p. 90 Fig Next Business to consumer (B2C) Sale of goods to general public Short for electronic commerce Business transaction that occurs over the Internet Click to view Web Link, click Chapter 2, Click Web Link from left navigation, then click E-commerce below Chapter 2 Click to view video

24 Other Internet Services What is ? p. 91 Next 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 sitessuch 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

25 Other Internet Services What is an address? p. 93 Fig Next Unique name that consists of a user name and domain name that identifies the user

26 Other Internet Services What is FTP? p. 95 Fig Next File Transfer ProtocolInternet 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

27 Other Internet Services What is a chat? p. 98 Fig Next 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 Click to view video

28 About Internet Addresses Domain name: IP Address: (under IP Version 4) We could say => identifies the network 113 identifies specific computer on network 255 x 255 x 255 x 255 = 2**8 x 2**8 x 2**8 x 2**8 That is, 2**32 = 4 billion Internet addresses

29 About New IPv6 Internet Addresses A new IP addressing scheme called IPv6 (August 2004) will lengthen IP addresses from 32 bits to 128 bits and will provide for 64 x 10**36 IP addresses. That is, 256 undecillion Internet addresses. 2**128 = 2**8 x 2**120 = 256 x (2**30)**4 = 256 billion x billion x billion x billion

30 Other Internet Services What is instant messaging (IM)? p Fig Next Step 2. The server determines if any of your established friends, family, or coworkers, called buddies, are online Step 3. You send instant messages to an online buddy Step 1. Login to the IM server IM Server Step 4. Your Instant Message travels through a messaging server and then to the online buddy messaging Server A real-time Internet communications service that notifies you when one or more people are online and allows you to exchange messages or files


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