The Internet Is free Most people and businesses pay for Internet access Free services are often in exchange for providing contact information or viewing advertisements Fee-based content is growing Myth 2: Someone controls the Internet No single entity controls the Internet Governments can somewhat regulate Internet use within Its country but difficult to control It well Myth 3: The Internet and World Wide Web are Identical www. N. ‘ & internet is two separate concepts. Web or WWW is the fastest growing part of the internet. Its most important feature is “website”. Internet is the network of many outworks.
It is a global network linking tens of thousands of networks & millions of individual users, businesses, schools & Government agencies. Each organization is responsible only for maintaining Its own network The World Wide Web Consortium (WAC) oversees research and sets guidelines and standards Internet connects more than 200 universities and 115 companies via a high-speed private network Cable: Cable connections are considered one of the best types of internet connection available to the home user, they offer very fast and reliable connections with a fixed monthly fee. The broadband cable connection Is provided by the local cable TV provider.
Because the coaxial cable used by cable TV provides much greater bandwidth than telephone lines, a cable modem can be used to achieve extremely fast access. Cable speeds range from 512 Kbps to 20 Mbps. Because cable connections are Always on you will need a firewall and antivirus to protect your PC DSL: the telephone company over your existing copper wire. With DSL, you can get both voice and data over the same pair of wires. DSL service is a technology for bringing high-bandwidth broadband internet service to homes and small businesses over ordinary copper telephone lines There is no need to dial-in to your ISP as DSL is always on.
With DSL service all you need to do is plug your PC into your DSL modem and then from your modem to your normal telephone Jack DSL Speed – Kbps – 1. Mbps Satellite: The slowest broadband service is provided by satellite. Although this is a good replacement for dial-up for those people living in remote rural areas, the installation costs are quite high, but the ongoing monthly charges are competitive to both cable and DSL. Slower and more expensive that cable or DSL Wireless Connection:
Fixed wireless: Wireless Internet, or wireless broadband is one of the newest Internet connection types, uses radio frequency bands and towers for internet connection. Wireless Internet provides an always-on connection which can be accessed from anywhere ? as long as you geographically within a network coverage area. Hotshot: Public wireless networks Both free and fee-based are available Currently Wi-If so short range, but Wimpy may soon be an option The Internet Community Today: Most members of the Internet community fall into one or more of the following groups Users: People who use the Internet
Internet service providers (Sips): Provide access to the Internet, typically for a fee An access provider is a business that provides individuals and organizations access to the Internet free or for a fee An access provider is a business that provides individuals and organizations access to the Internet free or for a fee ISP (Internet service provider) Regional Sips provide Internet access to a specific geographical area The World Wide Web The World Wide Web, or Web, consists of a worldwide collection of electronic documents (Web pages) Can contain text, graphics, sound, video, and built-in injections 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 Hypertext Markup A Web browser, or browser, allows users to access Web pages and Web 2. Programs A home page is the first page that a Web site displays Web pages provide links to other related Web pages Surfing the Web Some Web pages are designed specifically for microbreweries A Web page has a unique address called a URL or Web address An IP address is a umber 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 Hypertext A way of formatting pages with embedded links that connect documents to one another, and that also link pages to other objects such as sound, video, or animation files Uses Hypertext Transfer Protocol (HTTP) and URL to locate resources on the Web Example URL http://public. Dawn. Com/2010/11 /03/sir-Lankan-stun- gussies-with-remarkable- comeback. Ml Web Servers and Web Clients Web server software: Enables a computer to deliver Web pages written in HTML or XML to clients on network that request this service by sending an HTTP request Basic capabilities: Hosting web pages, Security services, FTP,etc Term “Web server” also used to refer to physical computer that runs Web server software Web client: Any computing device attached to the Internet that is capable of making HTTP requests and displaying HTML pages What is downloading? The process of a computer receiving information Depending upon connection speed, downloading can take from a few seconds to overall minutes Uploading: is the process of transferring a file from local computer to remote computer over network. Tabbed browsing allows you to open and view multiple Web pages in a single Web browser window Two types of search tools are search engines and subject directories (http://dir. Yahoo. Mom/) A search engine is helpful in locating items such as: There are thirteen types of Web sites Multimedia refers to any application that combines text with: THE WORLD WIDE WEB BUMP, GIF, JEEP, PANG, and TIFF A thumbnail is a small version off larger graphic Animation is the appearance of motion created by displaying a series of still images n sequence 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 Video consists of images displayed in motion A plug-in is a program that extends the capability of a Web browser Web publishing is the development and maintenance of Web pages 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 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 A mailing list is a group of e-mail names and addresses given a single name Subscribing adds your e-mail name and address Inscribing removes your name Instant messaging (IM) is a real-time Internet communications service 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 Poi (Voice over ‘P) enables users to speak to other users over the Internet Also called Internet telephony 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 Netiquette Netiquette is the code of acceptable Internet behavior Beyond Browsing and E-Mail Many other activities available via the Internet in addition to Web browsing and e- mail Online communications Social networking Online shopping and investing Online entertainment Online news, reference, and information Online education and writing
Types of Online Communications Instant messaging (IM): Exchange of real-time message Buddy list Voice over Internet Protocol (Poi): Making telephone calls over the Internet PC to PC keep Discussion groups (message boards, newsgroups, or online forums): Read and post messages Chat rooms: Multiple users chat in real time Videoconferencing: Two-way conference using computers and communications technology Webzines: Web seminar, more one-way Blobs (Web log): Post short, frequently updates entries in chronological order Social Networking Social networking sites: Create a community of individuals with common interests Namespace, Backbone, etc. Allow people to post information about themselves Video and photo sharing (Youth, Flicker, etc. Collaborative news communities (Dig) Social bookmaking (del. CIO. s) Used for politics and business Business networking sites Family networking sites Users should be careful not to reveal too much about themselves for safety reasons Online Shopping and Investing E-commerce: Online financial transactions Precautions Be sure all e-commerce activities are performed via a secure Web server (HTTPS://) Use a credit card whenever possible Online shopping: Purchasing goods and services online Can purchase items via manufacturers, large businesses, small businesses, etc. Usually paid via credit card, though other options may be available Online News, Reference, and Information Online news Available through Web sites belonging to news organizations, television networks, newspapers, magazines, etc. News sites are usually regularly updated throughout the day News archives are often available (sometimes requires a fee) Reference sites Provide access to specific types of useful information Phone and address directories, weather, maps, home values, encyclopedias, dictionaries, etc.
Portal Pages, IRS Feeds, Bedposts, and Widgets Portal Web page: Designed to be displayed as a browser’s home page and visited on a regular basis Often contain news, calendars, e-mail, and other tools IRS (Really Simple Syndication): Delivers news, bedposts, and other regularly published content Individuals subscribe to an IRS feed and new content is delivered to them as it becomes available Bedposts: Recorded audio or video available via the Internet Prepared by individuals and companies tunes Store puts thousands of free bedposts at your fingertips Widgets: Small programs displayed on portal pages, desktops, dashboards, etc. Can be used to display headlines, among other uses e. G. Windows Vista gadgets Product, Corporate, and Government Information The Web is a useful tool for locating product and corporate information, as well as governmental information and publications online EDUCATION Online education: Using the Internet to facilitate learning Web-based training (WBT): Instruction delivered via the Web Corporate training, tutorials, etc.
Distance learning: Students take classes from location other than campus Advantages: Self-paced instruction, flexible location, up-to-date material, immediate dieback, and customized content Disadvantages: Technology requirements and problems, anonymity, and lack of face-to-face contact Online testing: Taking tests via the Internet Available for both objective and performance-based exams Typically are graded automatically Security is an issue Authorized testing centers Secure testing systems Online writing Blobs: Personal Web logs Wise: Editable collaborative Web page E-portfolios: Personal online portfolio This textbook has: Web site at wry. Course. Com/switch interactive activities, practice tests, etc. Blackboard learning platform SAM 2007 testing, etc.