Discovering Computers Fundamentals, Third Edition CGS 1000 Introduction to Computers and Technology Spring 2007

Discovering Computers Fundamentals, Third Edition Chapter 2 The Internet and World Wide Web

Discovering Computers Fundamentals, Third Edition Topics Covered Definition of Definition of homepage, homepage, downloading, downloading, URL, URL, hyperlink, hyperlink, search engine, search engine, subject directory subject directory Types of websites Types of websites Guidelines for evaluating the value of a website Guidelines for evaluating the value of a website

Discovering Computers Fundamentals, Third Edition The World Wide Web Multimedia: Multimedia: Application integrating text with other elements like: Application integrating text with other elements like: Graphics, Graphics, Animation, Animation, Audio, Audio, Video, Video, Virtual reality Virtual reality Plug-ins Plug-ins

Discovering Computers Fundamentals, Third Edition The World Wide Web Graphic: Graphic: Digital representation of non-text information such as drawing, chart, photograph. Different formats: Digital representation of non-text information such as drawing, chart, photograph. Different formats: 1. JPEG: (Joint Photographic Experts Group).jpg,.jpeg,.jpe,.jfif 2. GIF: (Graphics Interchange Format).gif works best for images with few distinct colors. Thumbnail: small version of a larger image used to improve web page display time. Thumbnail: small version of a larger image used to improve web page display time.

Discovering Computers Fundamentals, Third Edition The World Wide Web Animation: Animation: Appearance of motion created by displaying a series of still images in sequence. Appearance of motion created by displaying a series of still images in sequence. Audio: Audio: Music, speech, or any other sound Music, speech, or any other sound Individual compressed sound files that you download from the Web to your computer Individual compressed sound files that you download from the Web to your computer Common Web audio file formats are AA, AAC, AIFF, ASF, MP3, WAV, WMA, RA, and QT Common Web audio file formats are AA, AAC, AIFF, ASF, MP3, WAV, WMA, RA, and QT

Discovering Computers Fundamentals, Third Edition The World Wide Web Streaming Audio: Streaming Audio: Transfers data in a continuous and even flow. Transfers data in a continuous and even flow. Enables you to listen to the sound as it downloads to your computer Enables you to listen to the sound as it downloads to your computer Radio stations use streaming audio to broadcast over the Web Radio stations use streaming audio to broadcast over the Web

Discovering Computers Fundamentals, Third Edition The World Wide Web Video: Video: Consists of full-motion images with sound played back at various speeds Consists of full-motion images with sound played back at various speeds MPEG (Moving Pictures Experts Group) is popular video compression standard MPEG (Moving Pictures Experts Group) is popular video compression standard

Discovering Computers Fundamentals, Third Edition The World Wide Web Virtual Reality: Virtual Reality: Use of computers to simulate real or imagined environment Use of computers to simulate real or imagined environment Appears as a three dimensional (3-D) space Appears as a three dimensional (3-D) space Used for games and many practical applications Used for games and many practical applications

Discovering Computers Fundamentals, Third Edition The World Wide Web Plug-ins: Plug-ins: Programs that extend the capability of a browser Programs that extend the capability of a browser You can download many plug-ins at no cost from various Web sites You can download many plug-ins at no cost from various Web sites

Discovering Computers Fundamentals, Third Edition Web Publishing Step 4. Deploy the Web site Step 1. Plan the Web site Step 3. Create the Web site Step 2. Analyze and design the Web site Step 5. Maintain the Web site

Discovering Computers Fundamentals, Third Edition E-Commerce Electronic Commerce Electronic Commerce Business transaction that occurs over the Internet Business transaction that occurs over the Internet 3 types: 3 types: 1. B2C (Business-to-consumer) 2. C2C (Consumer-to-consumer) 3. B2B (Business-to-business)

Discovering Computers Fundamentals, Third Edition E-Commerce B2C B2C Sale of goods & services to general public Sale of goods & services to general public E.g.: Dell E.g.: Dell C2C C2C One consumer sells directly to another. One consumer sells directly to another. Online auction Online auction E.g.: eBay E.g.: eBay B2B B2B Businesses provide goods & services to other businesses Businesses provide goods & services to other businesses Online advertising, recruiting, training Online advertising, recruiting, training

Discovering Computers Fundamentals, Third Edition Other internet services Electronic mail Electronic mail The transmission of messages and files via a computer network 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 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 Internet access providers usually provide an program

Discovering Computers Fundamentals, Third Edition How does an message travel? Step 4. When recipient uses software to check for messages, the message transfers from incoming mail server to recipient’s computer Step 2. Your software contacts software on your ISP’s outgoing mail server Step 3. Software on outgoing mail server determines best route for data and sends message, which travels along Internet routers to recipient’s incoming mail server Step 1. Using software, you create and send message

Discovering Computers Fundamentals, Third Edition Other internet services FTP FTP File Transfer Protocol File Transfer Protocol Internet standard that permits you to upload and download files with other computers on the Internet Internet standard that permits you to upload and download files with other computers on the Internet Newsgroup Newsgroup Online area where users discuss a particular subject Online area where users discuss a particular subject Message Boards Message Boards Web based discussion group Web based discussion group

Discovering Computers Fundamentals, Third Edition Other internet services Mailing List Mailing List Group of addresses given a single name Group of addresses given a single name When a message is sent to the mailing list, everyone on the list receives the message When a message is sent to the mailing list, everyone on the list receives the message Chat Chat Real-time typed conversation that takes place on a computer Real-time typed conversation that takes place on a computer Chat room is location on server that permits users to discuss topics of interest Chat room is location on server that permits users to discuss topics of interest

Discovering Computers Fundamentals, Third Edition Other internet services Instant Messaging Instant Messaging A real-time Internet communications service that notifies you when one or more people are online and allows you to exchange messages or files A real-time Internet communications service that notifies you when one or more people are online and allows you to exchange messages or files Internet Telephony Internet Telephony Enables users to speak to other users over the Internet using their computer Enables users to speak to other users over the Internet using their computer

Discovering Computers Fundamentals, Third Edition Netiquette Internet etiquette Internet etiquette Code of acceptable behaviors users should follow while on the Internet Code of acceptable behaviors users should follow while on the Internet Golden Rule: Treat others as you would like them to treat you. Golden Rule: Treat others as you would like them to treat you.

Discovering Computers Fundamentals, Third Edition Chapter Summary History and structure of the Internet The World Wide Web FTP Newsgroups and Message Boards Chat Rooms and Instant Messaging Internet Telephony Netiquette

Discovering Computers Fundamentals, Third Edition Questions?