Who controls the internet? o No one – it is public, cooperative, independent network o Several organizations set standars World wide web consortium Oversees research, sets standards and guidelines o Time Berners- lee, director MORE Evolution of the Internet o Many home and small business users connect to the internet via high-speed broadband internet services
Cable internet service DSL – Digital subscriber line Fiber to the Premises (FTTP) Fixed wireless Cellular radio network WI-FI Satellite Internet Service Access Provider: is a business that provides individuals and organizations access to the internet free or for a fee o ISP( Internet Service provider) o Online Service Provider (OSP) o Wireless Internet Service Provider (WISP) Multimedia refers to any application that combines text with: o Graphics o Animation o Audio o Video o Virtual reality What graphics formats are used on the Web? o BMP o JPEG o PNG (Pronounced Ping) o GIF o TIFF What is animation ? o Appearance of motion created by displaying a series of still images in sequences o File formats: GIF What is audio ? o Music, speech What is video? o Consists of full-motion images that are played back at various speeds o MPEG The World Wide Web or Web, consists of a worldwide collection of electronic documents (web pages) o A website is a collection of related web pages and associated items o A web server is a computer that delivers requested web pages to your computer o Web 2.0 refers to web sites that provide a means for users to interact; next generation. o An IP Address is a number that uniquely identifies each computer or device connected to the Internet. o A domain name is the text version of an IP address Top-level domain (TLD) – edu, com, org IP Address 184.108.40.206 Domain Name o A DNS server translates the domain name into its associated IP address o Browser application program that allows you to view Web pages. Internet Explorer, Google Chrome
HTML = hyper-text markup language o A Web page has a unique address called a URL or Web address . http:// = protocol = domain name /grsm/planyourvist/ = path /wildlifeviewing.htm = Web page name Web Mechanics o Hyper Text Markup Language – HTML Page tags <html></html> <header></header> <title></title> <body></body> Text tags <p></p> The World Wide Web o A home page is the first page that a Web site displays o Web pages provide links to other related Web pages Surfing the Web o MORE Exactly what happens when data is retrieved via web page? o Web users -> customers request via web form -> script file to search customers- >web server -> DB command -> Database server -> DB records -> web server -> HTML What is streaming audio?
- Fall '12
- Central processing unit, World Wide Web, web pages