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Chapter 02 The Internet
1.
Chapter 2 The Internet Discovering
Computers Technology in a World of Computers, Mobile Devices, and the Internet
2.
Objectives Overview Discuss the
evolution of the Internet Briefly describe various broadband Internet connections Describe the purpose of an IP address and its relationship to a domain name Describe features of browsers and identify the components of a web address Describe ways to enter effective search text Explain benefits and risks of using social networking sites Copyright © Cengage Learning. All rights reserved. See Page 54 for Detailed Objectives
3.
Objectives Overview Describe uses
of various types of websites Identify and briefly describe the steps required for web publishing Explain how the web uses graphics, animation, audio, video, and virtual reality Explain how email, email lists, instant messaging, chat rooms, discussion forums, VoIP, and FTP work Identify the rules of netiquette Copyright © Cengage Learning. All rights reserved. See Page 54 for Detailed Objectives
4.
The Internet • The
Internet is a worldwide collection of networks that links millions of businesses, government agencies, educational institutions, and individuals Copyright © Cengage Learning. All rights reserved.Pages 54 - 55 Figure 2-1
5.
Evolution of the
Internet • The Internet originated as ARPANET in September 1969 and had two main goals: Copyright © Cengage Learning. All rights reserved. Page 54 Allow scientists at different physical locations to share information and work together Function even if part of the network were disabled or destroyed by a disaster
6.
Evolution of the
Internet 1969 ARPANET becomes functional 1984 ARPANET has more than 1,000 individual computers linked as hosts Today Millions of hosts connect to the Internet Copyright © Cengage Learning. All rights reserved. Page 54
7.
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 Copyright © Cengage Learning. All rights reserved.
8.
Connecting to the
Internet Page 56 Figure 2-2 Copyright © Cengage Learning. All rights reserved.
9.
Connecting to the
Internet Wired • Cable Internet service • DSL (digital subscriber line) • Fiber to the Premises (FTTP) Wireless • Wi-Fi (wireless fidelity) • Mobile broadband • Fixed wireless • Satellite Internet Service Page 57 Copyright © Cengage Learning. All rights reserved.
10.
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 Figure 2-3 Copyright © Cengage Learning. All rights reserved.
11.
Connecting to the
Internet Copyright © Cengage Learning. All rights reserved. Page 58 • 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)
12.
Connecting to the
Internet Copyright © Cengage Learning. All rights reserved. Page 59 Figure 2-4
13.
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 Copyright © Cengage Learning. All rights reserved. Pages 60 - 61 Figure 2-5
14.
Connecting to the
Internet Copyright © Cengage Learning. All rights reserved. Page 60 Table 2-3
15.
Connecting to the
Internet Copyright © Cengage Learning. All rights reserved. Page 61 Figure 2-6
16.
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 Copyright © Cengage Learning. All rights reserved. Pages 61 - 62
17.
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 Copyright © Cengage Learning. All rights reserved.Pages 62 - 63 Figure 2-7
18.
The World Wide
Web • A webpage has a unique address called a web address or URL Copyright © Cengage Learning. All rights reserved. Pages 64 - 65 Figure 2-8
19.
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 Figure 2-10 Copyright © Cengage Learning. All rights reserved.
20.
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 Copyright © Cengage Learning. All rights reserved. Pages 67 - 68
21.
Types of Websites •
Search operators can help to refine your search Copyright © Cengage Learning. All rights reserved. Page 68 Table 2-4
22.
The World Wide
Web • There are thirteen types of Web sites Copyright © Cengage Learning. All rights reserved. Pages 68 – 72 Online social network Informational Media sharing and bookmarking sites News, weather, sports, and other mass media Educational Business, Governmental, and Organizational
23.
The World Wide
Web Blogs Wikis Health and Science Entertainment Financial Travel and Mapping Pages 72 – 75 Copyright © Cengage Learning. All rights reserved.
24.
The World Wide
Web Shopping and Auctions Careers and Employment E-Commerce Portals Pages 75 – 78 Copyright © Cengage Learning. All rights reserved.
25.
The World Wide
Web • Web publishing is the development and maintenance of websites Pages 78 - 79 Copyright © Cengage Learning. All rights reserved. Maintain the website Host the website Create the website Design the website Plan the website
26.
Media on the
Web • Multimedia refers to any application that combines text with: Copyright © Cengage Learning. All rights reserved. Page 79
27.
Media on the
Web • A graphic is a digital representation of nontext information • Graphic formats include BMP, GIF, JPEG, PNG, and TIFF Copyright © Cengage Learning. All rights reserved.Pages 80 – 81 Figure 2-21
28.
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 Copyright © Cengage Learning. All rights reserved.Pages 80 – 81 Figure 2-22
29.
Media on the
Web • Animation is the appearance of motion created by displaying a series of still images in sequence Copyright © Cengage Learning. All rights reserved. Page 81
30.
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 Copyright © Cengage Learning. All rights reserved. Page 82 Figure 2-23
31.
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 Copyright © Cengage Learning. All rights reserved. Page 83 Figure 2-24
32.
Media on the
Web A plug-in is a program that extends the capability of a Web browser Copyright © Cengage Learning. All rights reserved. Page 83
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 Copyright © Cengage Learning. All rights reserved.Page 84
34.
Other Internet Services Copyright
© Cengage Learning. All rights reserved. Page 85 Figure 2-25
35.
Other Internet Services •
An email list is a group of email addresses used for mass distribution of a message Copyright © Cengage Learning. All rights reserved. Page 86 Figure 2-26
36.
Other Internet Services •
Instant messaging (IM) is a real-time Internet communications service Copyright © Cengage Learning. All rights reserved. Page 86 Figure 2-27
37.
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 Copyright © Cengage Learning. All rights reserved.Page 87 Figure 2-30
38.
Other Internet Services •
A discussion forum is an online area in which users have written discussions about a particular subject Page 87 Figure 2-29 Copyright © Cengage Learning. All rights reserved.
39.
Other Internet Services •
VoIP (Voice over IP) enables users to speak to other users over the Internet Copyright © Cengage Learning. All rights reserved.Page 88 Figure 2-31
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 Copyright © Cengage Learning. All rights reserved. Page 88
41.
Netiquette • Netiquette is
the code of acceptable Internet behavior Copyright © Cengage Learning. All rights reserved. Page 90 Figure 2-30
42.
Summary Evolution of the Internet The
Web Various types of websites Other services available on the Internet Netiquette Copyright © Cengage Learning. All rights reserved. Page 91
43.
Chapter 2 The Internet Discovering
Computers Technology in a World of Computers, Mobile Devices, and the Internet Chapter 2 Complete
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