Vce It Applications Unit 3 Outcome 1

IT Applications social unit 3 Outcome 1 Revision Notes IT VCE Feb 2013 IT Applications Unit 3 Outcome 1 Revision Notes IT VCE Feb 2013 Table of themes Revision2 discussion section 1 Purpose of a Website2 Blogs2 Chat populate2 Forums3 affectionate Networking3 Wikis3 department 2 Websites and Data4 wherefore Organisations Acquire Data Via Websites4Why Individuals and Organisation Supply Data Via Websites4 Techniques for getting Data on Websites4 Techniques for protecting the rights of individuals and organisations supplying data4 CSS/CMS5 Static Websites5 Dynamic Websites5 satisfy Management Systems5 Introduction5 Content Creation5 Content Management6 Publishing6 Pre moveation6 Pros and Cons7 Softwargon7 Cascading Styled Sheets (CSS)7 IntroductionError Bookmark not defined. Revision Section 1 Purpose of a Website * To provide inform ation and intelligence operation (inform)Static Website (no interaction) * To uphold an opinion (persuade)Blog To t apiece (educate)Wiki * To answer questionsForum * To entertain * To provide information and news (inform) * To promote an opinion (persuade) * To teach (educate) * To answer questions * To entertain Blogs * Diary entries, commentary, news, pictures and videos * in the main one way communicating * become feedback so readers shadower conduce comment * Most argon textual matter based * usages Videoshttp//ryan foreshorten. blogspot. com. au Audiohttp//www. abc. net. au/services/poadcasting Photoshttp//www. photoblog. com/stuartbarbara * Technorati (http//technorati. com )is a popular search engine Chat Rooms Online messaging services * Communication in real time (synchronous living or occurring at same time) * Many are commercial * permit communities interact quickly * Textbox, Scrolling Window * To join need to register, given a commitr constitute and password for security * Avatar is an identity/nickname substance abusers assumes to protect their name * Moderator is a person who monitors communication to en authentic people follow rules, they subscribe power to ban, discipline, warn and educate users. * Rules No abusing No round (deliberately location inflammatory messages to get a reaction) take int flood Example http//www. wireclub. com Forums * Also known as message boards * Multi-user threaded message screening * Posted messages is form of conversation between users * Thread is a un illogical conversation/post & replies on a specific topic * class-conscious forums divided into boards (main topics) and sub-boards (sub-topics) * Example http//forums. whirlpool. net. au * Have their own netiquette/etiquette/rules No spamming (flooding boniface with data) Posts must be on-topic (OT) regionl Arguments with individuals should be taken No trolling No abusing Read rules Give posts titlesBanned topics not to be used Social Networkin g * targets totallyow people to communicate with others * Present information ab issue themselves * both(prenominal) are special-interest (e. g. green living, Indian people, genealogy, teenagers) * Others (e. g. Facebook, Twitter) have no specific theme. * Have a profile page * Problems Stalking Grooming Posting Persona info Posts will last forever Employers have sacked workers Wikis * Examples Wikipedia, Wikispaces * Online computer software tools that let a group of people contribute to the development of a document or knowledge base. * Needs some control everywhere editings Prevent accidental or deliberate damage to the aggregated information. * Wikipedia nameless edits need to be approved by a moderator. * Controversial topics whitethorn be locked so only registered user, or specific users can edit them. Section 2 Websites and Data Why Organisations Acquire Data Via Websites * brasslike * 24 hour customer access * Instant * Efficiency * forcefulness Increased accuracy if visitors enter own data Less jeopardy of error Can be processed mechanically once entered persona data easier to read * Access to global market * Can use prompts (* shift+8) to collect right data Can use controls radiocommunication buttons to enforce data integrity * Use validation tools to realize sure its in right format (DOB dd/mm/yy) * People are put off by having to email, write or phone Why Individuals and Organisation Supply Data Via Websites * Purchasing of goods and Services * Social Networking * Ex changing Information * Immediate results * Anonymity * Voting/Polls Techniques for Acquiring Data on Websites * Collating data from entries in a mesh form * Providing a weathervane forum * Online chat Techniques for protecting the rights of individuals and organisations supplying data * security protocolsSSL or TLS encryption. Transport Layer Security(TLS) and its predecessor,Secure Sockets Layer(SSL), provide communicationsecurityover theInternet * File encryption * Logins with usernames and passwords. * Using Captcha to dissuade robotic logins. * Automatic timeout of idle connections. Very commom in the financial sector * Requiring sozzled passwords CSS/CMS Static Websites * Each page is produced by hand, using GUI web editor (e. g. Dreamweaver) or raw HTML code * Pages never alter without being edited * Can be dull and unresponsive to authorized conditions Imagine a static eBay site where the finishing time of all auctions had to be entered by hand every second. Dynamic Websites * Constantly changing e. g. eBay * Can respond to events and the profile of the user * Can be achieved to a degree with Javascript (e. g. a countdown timer on a static page) Content Management Systems Introduction A content direction system (CMS) keep backs the creation, caution, distribution, make, and find of corporate information. It covers the complete lifecycle of the pages on your site, from providing simple tools to create the content, through to pu blishing, and concludingly to archiving.It alike provides the ability to manage the structure of the site, the behavior of the create pages, and the pilotage provided to the users. The functionality of a content management system can be broken down into several main categories * content creation * content management * Publishing * presentation Content Creation At the front of a content management system is an easy-to-use authoring environment, designed to work like Word. This provides a non-technical way of creating new pages or updating content, without having to know any HTML.The CMS also allows you to manage the structure of the site. That is, where the pages go, and how they are linked together. Many even protract simple drag-and-drop restructuring of the site, without breaking any links. Almost all content management systems now provide a web-based authoring environment, which further simplifies implementation, and allows content updating to be done remotely. Content Man agement Once a page has been created, it is saved into a central repository in the CMS. This stores all the content of the site, on with the other supporting details.This central repository allows a range of utilizable larks to be provided by the CMS Keeping track of all the versions of a page, and who reassignd what and when. Ensuring that each user can only change the section of the site they are responsible for. Integration with existing information sources and IT systems. Publishing Once the final content is in the repository, it can then be published out to either the website or intranet. Content management systems boast powerful publishing engines which allow the appearance and page layout of the site to be applied automatically during publishing.It may also allow the same content to be published to multiple sites. Of course, every site tonuss different, so the CMS lets the graphic designers and web developers congeal the appearance that is applied by the system. These publishing capabilities ensure that the pages are uniform across the entire site, and enable a very high shopworn of appearance. This also allows the authors to concentrate on writing the content, by leaving the look of the site entirely to the CMS. Presentation The content management system can also provide a number of features to enhance the quality and dominance of the site itself.As an example, the CMS will build the site navigation for you, by denotation the structure straight out of the content repository. It also makes it easy to support multiple browsers, or users with accessibility issues. The CMS can be used to make your site dynamic and interactive, thereby enhancing the sites impact. * Examples WordPress, Joomla, Drupal Videos to Watch * http//www. youtube. com/ memorise? feature=player_detailpage&v=VdvEdMMtNMY * http//www. youtube. com/watch? feature=player_detailpage&v=jexUS43sdeQ * http//www. youtube. com/watch? feature=player_detailpage&v=VdvEdMMtNMY * http//www . outube. com/watch? feature=player_detailpage&v=RUSAJ_2ZqNI * Database-driven software that creates pages when needed and tailor-makes them for the time, the circumstances, the user * The CMS fetches content (e. g. text, data, pictures) from the database and creates a webpage with pre-defined formatting chosen by the webmaster. * The same pages cogency look different for each person viewing it (e. g. their My eBay pages, or their Facebook pages. ) Pros and Cons Pros * Site maintenance is far easier and quicker * Sites become dynamic and pages change automatically Easier to manage assets (pictures etc) * Better looking sites * Site has a consistent appearance across all pages * Far less chance of 404 errors or badly links Cons * Must install CMS software onto your webserver some are big-ticket(prenominal) * Must learn how to use the CMS * Can be expensive/ dense to convert an existing static site to CMS Software Webmaster creates content (e. g. clay text) Media (pix, videos etc ) are stored in the database The CMS combines content, media, formatting to create web pages which are sent to the visitors browser Cascading Styled Sheets (CSS) CSS * Instead of repetitively formatting wads of types of text in the same way, define the formatting in a CSS file and just mark text with the style it needs * To change the look of main headings, change the definition of HEADING1 once in the CSS file. * Dont have to find and change every piece of HEADING1 text across the site * Far quicker, easier * Creates consistently formatted sites * E. g. CSS file contains Heading 1 = Bold, TNR, size 20 * In a webpage, some text is attach as being Heading 1 style. CSS Tutorial * http//www. w3schools. com/css/