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Discovering Computers 2012
Your Interactive Guide to the Digital World
Objectives Overview
Identify and briefly describe various broadband Internet Discuss the evolution of the connections and state Describe the types of Internet Internet differences between broadband access providers Internet connections and dial- up connections
Describe how to use a search Describe the purpose of an IP Explain the purpose of a Web engine to search for address and its relationship to a browser and identify the information on the Web and domain name components of a Web address differentiate between a search engine and a subject directory
See Page 73 2 for Detailed Objectives Discovering Computers 2012: Chapter 2
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Objectives Overview
Explain how Web pages use Identify and briefly describe Describe the types of Web graphics, animation, audio, the steps required for Web sites video, virtual reality, and publishing plug-ins
Explain how e-mail, mailing lists, instant messaging, Describe the types of e- Identify the rules of chat rooms, VoIP, commerce netiquette newsgroups and message boards, and FTP work
See Page 73 3 for Detailed Objectives Discovering Computers 2012: Chapter 2
The Internet
• The Internet is a worldwide collection of networks that links millions of businesses, government agencies, educational institutions, and individuals
Page 74 Discovering Computers 2012: Chapter 2 4 Figure 2-1
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Evolution of the Internet
• The Internet originated as ARPANET in September 1969 and had two main goals:
Allow scientists at Function even if part of different physical the network were locations to share disabled or destroyed information and work by a disaster together
Page 75 Discovering Computers 2012: Chapter 2 5
Evolution of the Internet
1986 NSF connects NSFnet to 1969 ARPANET and ARPANET becomes 1996 becomes known as the Internet2 is functional Internet founded
1984 1995 NSFNet Today More ARPANET has terminates than 550 more than its network million hosts 1,000 on the connect to individual Internet and the Internet computers resumes linked as status as hosts research network
Pages 75 - 76 Discovering Computers 2012: Chapter 2 6
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Evolution of the Internet
• Each organization is responsible only for maintaining its own network – The World Wide Web Consortium (W3C) oversees research and sets guidelines and standards • Internet2 connects more than 200 universities and 115 companies via a high-speed private network
Page 76 Discovering Computers 2012: Chapter 2 7
Evolution of the Internet
• Many home and small business users connect to the Internet via high-speed broadband Internet service
Fiber to Cable Cellular Satellite the Fixed Internet DSL Radio Wi-Fi Internet Premises wireless service Network Service (FTTP)
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Evolution of the Internet
• An access provider is a business that provides individuals and organizations access to the Internet free or for a fee
Page 77 Discovering Computers 2012: Chapter 2 9 Figure 2-2
Evolution of the Internet
ISP (Internet Online service Wireless Internet service provider) provider (OSP) service provider
Regional ISPs Provides wireless provide Internet Has many members- Internet access to access to a specific only features computers and geographical area mobile devices
National ISPs Popular OSPs include provide Internet AOL (America May require a access in cities and Online) and MSN wireless modem towns nationwide (Microsoft Network)
Page 78 Discovering Computers 2012: Chapter 2 10
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Evolution of the Internet
Page 79 Discovering Computers 2012: Chapter 2 11 Figure 2-3
Evolution of the Internet
• An IP address is a number that uniquely identifies each computer or device connected to the Internet • A domain name is the text version of an IP address – Top-level domain (TLD) • A DNS server translates the domain name into its associated IP address
Pages 79 – 80 Discovering Computers 2012: Chapter 2 12 Figure 2-4
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Evolution of the Internet
Page 80 Discovering Computers 2012: Chapter 2 13 Figure 2-5
The World Wide Web
• The World Wide Web, or Web, consists of a worldwide collection of electronic documents (Web pages) • A Web site is a collection of related Web pages and associated items • A Web server is a computer that delivers requested Web pages to your computer • Web 2.0 refers to Web sites that provide a means for users to interact
Pages 80 - 81 Discovering Computers 2012: Chapter 2 14
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The World Wide Web
• A Web browser, or browser, allows users to access Web pages and Web 2.0 programs
Internet Firefox Opera Explorer
Google Safari Chrome
Page 81 Discovering Computers 2012: Chapter 2 15
The World Wide Web
Page 81 Discovering Computers 2012: Chapter 2 16 Figure 2-6
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The World Wide Web
• A home page is the first • Some Web pages are page that a Web site designed specifically for displays microbrowsers • Web pages provide links to other related Web pages – Surfing the Web • Downloading is the process of receiving information
Pages 82 - 83 17 Figure 2-7 Discovering Computers 2012: Chapter 2
The World Wide Web
• A Web page has a unique address called a URL or Web address
Pages 82 – 83 Discovering Computers 2012: Chapter 2 18 Figure 2-8
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The World Wide Web
• Tabbed browsing allows you to open and view multiple Web pages in a single Web browser window
Page 84 Discovering Computers 2012: Chapter 2 19 Figure 2-9
The World Wide Web
• Two types of search tools are search engines and subject directories Search Subject engine directory
Classifies Web Finds information pages in an related to a organized set of specific topic categories
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The World Wide Web
Page 85 Discovering Computers 2012: Chapter 2 21 Figure 2-10
The World Wide Web
• A search engine is helpful in locating items such as:
Images Videos Audio Publications
People or Maps Blogs Businesses
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The World Wide Web
Page 86 Discovering Computers 2012: Chapter 2 23 Figure 2-11
The World Wide Web
• Some Web browsers contain an Instant Search box to eliminate the steps of displaying the search engine’s Web page prior to entering the search text
Page 87 Discovering Computers 2012: Chapter 2 24 Figure 2-12
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The World Wide Web
• Search operators can help to refine your search
Page 87 Discovering Computers 2012: Chapter 2 25 Figure 2-13
The World Wide Web
• There are thirteen types of Web sites
Portal News Informational Business/Marketing
Blog Wiki Online Social Educational Network Pages 88 – 91 Discovering Computers 2012: Chapter 2 26 Figure 2-15
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The World Wide Web
Entertainment Advocacy Web Application
Content Personal Aggregator
Pages 91 – 92 Discovering Computers 2012: Chapter 2 27 Figure 2-15
Video: Tell Your Stories via Vlog
CLICK TO START
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The World Wide Web
• Information presented on the Web must be evaluated for accuracy • No one oversees the content of Web pages
Page 92 29 Figure 2-16 Discovering Computers 2012: Chapter 2
The World Wide Web
• Multimedia refers to any application that combines text with:
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The World Wide Web
• A graphic is a digital representation of nontext information • Graphic formats include BMP, GIF, JPEG, PNG, and TIFF
Page 93 31 Figure 2-17 Discovering Computers 2012: Chapter 2
The World Wide Web
• A thumbnail is a small version of a larger graphic
Page 94 32 Figure 2-19 Discovering Computers 2012: Chapter 2
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The World Wide Web
• Animation is the appearance of motion created by displaying a series of still images in sequence
Page 94 Discovering Computers 2012: Chapter 2 33
The World Wide Web
• Audio includes music, speech, or any other sound – Compressed to reduce file size • You listen to audio on your computer using a player • Streaming is the process of transferring data in a continuous and even flow
Pages 94 – 95 Discovering Computers 2012: Chapter 2 34 Figure 2-20
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The World Wide Web
Page 95 Discovering Computers 2012: Chapter 2 35 Figure 2-21
The World Wide Web
• Video consists of images displayed in motion
Page 96 Discovering Computers 2012: Chapter 2 36 Figure 2-22
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The World Wide Web
• Virtual reality (VR) is the use of computers to simulate a real or imagined environment that appears as a three-dimensional space
Pages 96 – 97 Discovering Computers 2012: Chapter 2 37 Figure 2-23
The World Wide Web
• A plug-in is a program that extends the capability of a Web browser
Page 97 Discovering Computers 2012: Chapter 2 38 Figure 2-24
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The World Wide Web
• Web publishing is the development and maintenance of Web pages
Analyze Maintain Plan a and Create a Deploy a a Web Web site design a Web site Web site site Web site
Page 98 Discovering Computers 2012: Chapter 2 39
E-Commerce
• E-commerce is a business transaction that occurs over an electronic network – M-commerce identifies e-commerce that takes place using mobile devices
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E-Commerce
Business- to- consumer (B2C)
E-commerce
Business- Consumer- to- to- business consumer (B2B) (C2C)
Pages 98 - 99 Discovering Computers 2012: Chapter 2 41
E-Commerce
Page 99 Discovering Computers 2012: Chapter 2 42 Figure 2-25
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Other Internet Services
• E-mail is the transmission of messages and files via a computer network • An e-mail program allows you to create, send, receive, forward, store, print, and delete e-mail messages
Page 101 43 Figure 2-26 Discovering Computers 2012: Chapter 2
Other Internet Services
Page 102 Discovering Computers 2012: Chapter 2 44 Figure 2-27
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Other Internet Services
• A mailing list is a group of e-mail names and addresses given a single name – Subscribing adds your e-mail name and address – Unsubscribing removes your name
Page 103 Discovering Computers 2012: Chapter 2 45 Figure 2-28
Other Internet Services
• Instant messaging (IM) is a real-time Internet communications service
Page 104 Discovering Computers 2012: Chapter 2 46 Figure 2-29
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Other Internet Services
• A chat is a real-time typed conversation that takes place on a computer • A chat room is a location on an Internet server that permits users to chat with each other
Page 105 Discovering Computers 2012: Chapter 2 47 Figure 2-30
Other Internet Services
• VoIP (Voice over IP) enables users to speak to other users over the Internet – Also called Internet telephony
Page 106 Discovering Computers 2012: Chapter 2 48 Figure 2-31
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Other Internet Services
• A newsgroup is an online area in which users have written discussions about a particular subject – Typically requires a newsreader • A message board is a Web-based type of discussion group
Page 107 Discovering Computers 2012: Chapter 2 49 Figure 2-32
Other Internet Services
• FTP (File Transfer Protocol) is an Internet standard that permits file uploading and downloading with other computers on the Internet • Many operating systems include FTP capabilities • An FTP server is a computer that allows users to upload and/or download files using FTP
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Netiquette
• Netiquette is the code of acceptable Internet behavior
Page 108 Discovering Computers 2012: Chapter 2 51 Figure 2-33
Summary
Browsing, navigating, History and structure of searching, Web World Wide Web the Internet publishing, and e-commerce
Other Internet services: e-mail, instant messaging, chat rooms, Rules of netiquette VoIP, newsgroups and message boards, and FTP
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Discovering Computers 2012
Your Interactive Guide to the Digital World Chapter 2 Complete
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