Discovering Computers Enhanced Edition 2017 PDF Chapter 2

Discovering Computers Enhanced Edition ©2017 Tools, Apps, Devices, and the Impact of Technology Chapter 2 Connecting and Communicating Online Objectives Overview Describe the purpose Briefly describe Discuss the e...

Discovering Computers Enhanced Edition ©2017 Tools, Apps, Devices, and the Impact of Technology Chapter 2 Connecting and Communicating Online 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 browsers and identify compose effective the components of a search text web address 2 Objectives Overview Explain how the web Explain benefits and Describe uses of uses graphics, risks of using online various types of animation, audio, social networks websites video, and virtual reality Explain how email, email lists, instant Identify the rules of messaging, chat rooms, netiquette online discussions, VoIP, and FTP work 3 The Internet The Internet is a worldwide collection of networks that connects millions of businesses, government agencies, educational institutions, and individuals Pages 56 - 57 4 Figure 2-1 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 56 5 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 56 6 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 or other communications device that enables wireless connectivity Page 58 7 Connecting to the Internet Page 58 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 59 9 Connecting to the Internet A hot spot is a wireless network that provides Internet connections to mobile computers and devices Pages 59 - 60 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 Connecting to the Internet Page 62 12 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 62 - 64 13 Figure 2-5 Connecting to the Internet Page 63 14 Table 2-3 Connecting to the Internet Page 64 15 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 Page 65 16 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 Current browsers typically support tabbed browsing Pages 65 - 66 17 Figure 2-7 The World Wide Web A webpage has a unique address, called a web address or URL Page 68 18 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 69 – 70 19 Figure 2-9 Types of Websites A web 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 71 - 72 20 Types of Websites Search operators can help to refine your search Page 72 21 Table 2-4 Types of Websites There are several types of websites Online social Informational Search engine network and research News, weather, Media sharing Bookmarking sports, and other mass media Pages 71 – 76 22 Types of Websites Business, Educational governmental, and Blogs organizational Wiki and Health and fitness Science collaboration Pages 77 – 79 23 Types of Websites Banking and Travel and Entertainment finance tourism Retail and Mapping auctions Pages 79 – 82 24 Types of Websites Careers and E-commerce Portals employment Website Content creation and aggregation management Pages 82 – 84 25 Types of Websites Web publishing is the creation and maintenance of websites Design Create Maintain Plan the Host the the the the website website website website website Page 84 26 Digital Media on the Web Multimedia refers to any application that combines text with media Page 85 27 Digital Media on the Web A graphic is a visual representation of nontext information Graphic formats include BMP, GIF, JPEG, PNG, and TIFF Pages 85 – 86 28 Figure 2-22 Digital 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 Page 86 29 Figure 2-23 Digital Media on the Web Animation is the appearance of motion created by displaying a series of still images in sequence Page 86 30 Digital 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 Pages 86 - 87 31 Figure 2-24 Digital 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 Pages 87 - 88 32 Figure 2-25 Digital Media on the Web A plug-in, or add-on, is a program that extends the capability of a browser Page 88 33 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 88 34 Other Internet Services Page 89 35 Figure 2-26 Other Internet Services An email list is a group of email addresses used for mass distribution of a message Page 90 36 Figure 2-27 Other Internet Services Instant messaging services notify you when one or more of your established contacts are online and then allows you to exchange messages or files or join a private chat room with them Page 90 37 Figure 2-28 Other Internet Services A chat is a real-time typed conversation that takes place on a computer or mobile device with many other online users A chat room is a website or application that permits users to chat with others who are online at the same time Page 91 38 Figure 2-29 Other Internet Services An online discussion is an online area in which users have written discussions about a particular subject Page 91 39 Figure 2-30 Other Internet Services VoIP (Voice over IP) enables users to speak to other users via their Internet connection Page 92 40 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 92 41 Netiquette Netiquette is the code of acceptable Internet behavior Page 94 42 Figure 2-31 Chapter Summary Various types Evolution of The web of websites the Internet and media Other services available on Netiquette the Internet Page 95 43  Discovering Computers Enhanced Edition ©2017 Tools, Apps, Devices, and the Impact of Technology Chapter 2 Connecting and Communicating Online Chapter 2 Complete