Chapter_02.pdf

Discovering Computers Technology in a World of Computers, Mobile Devices, and the Internet Chapter 2 The Internet Objectives Overview Describe the purpose Briefly describe Discuss the evolution...

Discovering Computers Technology in a World of Computers, Mobile Devices, and the Internet Chapter 2 The Internet Objectives Overview Describe the purpose Briefly describe Discuss the evolution of an IP address and various broadband of the Internet its relationship to a Internet connections domain name Describe features of Describe ways to Explain benefits and browsers and identify enter effective search risks of using social the components of a text networking sites web address See Page 54 2 for Detailed Objectives Discovering Computers: Chapter 2 Objectives Overview Explain how the web Identify and briefly Describe uses of uses graphics, describe the steps various types of animation, audio, required for web websites video, and virtual publishing reality Explain how email, email lists, instant Identify the rules of messaging, chat rooms, netiquette discussion forums, VoIP, and FTP work See Page 54 3 for Detailed Objectives Discovering Computers: Chapter 2 The Internet The Internet is a worldwide collection of networks that links millions of businesses, government agencies, educational institutions, and individuals Pages 54 - 55 Discovering Computers: Chapter 2 4 Figure 2-1 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 54 5 Discovering Computers: Chapter 2 Evolution of the Internet 1969 ARPANET Today Millions of becomes hosts connect to functional the Internet 1984 ARPANET has more than 1,000 individual computers linked as hosts Page 54 6 Discovering Computers: Chapter 2 Connecting to the Internet With wired connections, a computer or device physically attaches via a cable or wire to a communications device Computers without a communications device can use a wireless modem Page 56 Discovering Computers: Chapter 2 7 Connecting to the Internet Page 56 Discovering Computers: Chapter 2 8 Figure 2-2 Connecting to the Internet Wired Wireless Cable Internet Wi-Fi (wireless service fidelity) DSL (digital Mobile broadband subscriber line) Fixed wireless Fiber to the Satellite Internet Premises (FTTP) Service Page 57 Discovering Computers: Chapter 2 9 Connecting to the Internet A cybercafé is a location that provides computers with Internet access, usually for a fee A hot spot is a wireless network that provides Internet connections to mobile computers and devices Page 57 Discovering Computers: Chapter 2 10 Figure 2-3 Connecting to the Internet An Internet service provider (ISP) is a business that provides individuals and organizations access to the Internet free or for a fee Bandwidth represents the amount of data that travels over a network – Megabyte (MB) – Gigabyte (GB) Page 58 11 Discovering Computers: Chapter 2 Connecting to the Internet Page 59 12 Discovering Computers: Chapter 2 Figure 2-4 Connecting to the Internet An IP address is a sequence of numbers that uniquely identifies each computer or device connected to the Internet A domain name is a text-based name that corresponds to the IP address A DNS server translates the domain name into its associated IP address Pages 60 - 61 13 Discovering Computers: Chapter 2 Figure 2-5 Connecting to the Internet Page 60 14 Discovering Computers: Chapter 2 Table 2-3 Connecting to the Internet Page 61 15 Discovering Computers: Chapter 2 Figure 2-6 The World Wide Web The World Wide Web (WWW), or web, consists of a worldwide collection of electronic documents (webpages) A website is a collection of related webpages and associated items A web server is a computer that delivers requested webpages to your computer Web 2.0 refers to websites that provide a means for users to share personal information, allow users to modify website content, and provide applications through a browser Pages 61 - 62 16 Discovering Computers: Chapter 2 The World Wide Web A browser is an application that enables users with an Internet connection to access and view webpages on a computer or mobile device A home page is the first page that a website displays Desktop browsers typically support tabbed browsing Pages 62 - 63 Discovering Computers: Chapter 2 17 Figure 2-7 The World Wide Web A webpage has a unique address called a web address or URL Pages 64 - 65 18 Discovering Computers: Chapter 2 Figure 2-8 The World Wide Web A web app is an application stored on a web server that you access through a browser – Web app hosts usually provide storage for users’ data and information on their servers, known as cloud storage Pages 65 – 66 Discovering Computers: Chapter 2 19 Figure 2-10 Types of Websites A search engine is software that finds websites, webpages, images, videos, news, maps, and other information related to a specific topic A subject directory classifies webpages in an organized set of categories, such as sports or shopping, and related subcategories Pages 67 - 68 20 Discovering Computers: Chapter 2 Types of Websites Search operators can help to refine your search Page 68 21 Discovering Computers: Chapter 2 Table 2-4 The World Wide Web There are thirteen types of Web sites Online social Media sharing and Informational network bookmarking sites News, weather, Business, sports, and other Educational Governmental, mass media and Organizational Pages 68 – 72 22 Discovering Computers: Chapter 2 The World Wide Web Health and Blogs Wikis Science Travel and Entertainment Financial Mapping Pages 72 – 75 Discovering Computers: Chapter 2 23 The World Wide Web Shopping Careers and and Auctions Employment E-Commerce Portals Pages 75 – 78 Discovering Computers: Chapter 2 24 The World Wide Web Web publishing is the development and maintenance of websites Design Create Maintain Plan the Host the the the the website website website website website Pages 78 - 79 Discovering Computers: Chapter 2 25 Media on the Web Multimedia refers to any application that combines text with: Page 79 26 Discovering Computers: Chapter 2 Media on the Web A graphic is a digital representation of nontext information Graphic formats include BMP, GIF, JPEG, PNG, and TIFF Pages 80 – 81 Discovering Computers: Chapter 2 27 Figure 2-21 Media on the Web An infographic is a visual representation of data and information, designed to communicate quickly, simplify complex concepts, or present patterns or trends Pages 80 – 81 Discovering Computers: Chapter 2 28 Figure 2-22 Media on the Web Animation is the appearance of motion created by displaying a series of still images in sequence Page 81 29 Discovering Computers: Chapter 2 Media on the Web Audio includes music, speech, or any other sound – Compressed to reduce file size You listen to audio on your computer using a media player Page 82 30 Discovering Computers: Chapter 2 Figure 2-23 Media on the Web Video consists of images displayed in motion Virtual reality (VR) is the use of computers to simulate a real or imagined environment that appears as a three- dimensional space Page 83 31 Discovering Computers: Chapter 2 Figure 2-24 Media on the Web A plug-in is a program that extends the capability of a Web browser Page 83 32 Discovering Computers: Chapter 2 Other Internet Services Email is the transmission of messages and files via a computer network An email program allows you to create, send, receive, forward, store, print, and delete email messages Page 84 Discovering Computers: Chapter 2 33 Other Internet Services Page 85 34 Discovering Computers: Chapter 2 Figure 2-25 Other Internet Services An email list is a group of email addresses used for mass distribution of a message Page 86 35 Discovering Computers: Chapter 2 Figure 2-26 Other Internet Services Instant messaging (IM) is a real-time Internet communications service Page 86 36 Discovering Computers: Chapter 2 Figure 2-27 Other Internet Services A chat is a real-time typed conversation that takes place on a computer or mobile device A chat room is a website or application that permits users to chat with others who are online at the same time Page 87 Discovering Computers: Chapter 2 37 Figure 2-30 Other Internet Services A discussion forum is an online area in which users have written discussions about a particular subject Page 87 Discovering Computers: Chapter 2 38 Figure 2-29 Other Internet Services VoIP (Voice over IP) enables users to speak to other users over the Internet Page 88 Discovering Computers: Chapter 2 39 Figure 2-31 Other Internet Services FTP (File Transfer Protocol) is an Internet standard that permits file uploading and downloading to and from 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 Page 88 40 Discovering Computers: Chapter 2 Netiquette Netiquette is the code of acceptable Internet behavior Page 90 41 Discovering Computers: Chapter 2 Figure 2-30 Summary Evolution of Various types The Web the Internet of websites Other services available on Netiquette the Internet Page 91 42 Discovering Computers: Chapter 2  Discovering Computers Technology in a World of Computers, Mobile Devices, and the Internet Chapter 2 The Internet Chapter 2 Complete