World Wide Web Flashcards
What are the advantages of using cascading style sheets when developing websites?
Cascading style sheets allow all styled features to be formatted in a predetermined manner. To make changes to a formatted item, the cascading style sheets only need to be changed once. If further formatting changes are required they can be achieved by amending the HTML code directly.
Who created the World Wide Web?
In the 1980s, the work of British computer scientist Tim Berners-Lee on the World Wide Web theorised protocols linking hypertext documents into a working system, marking the beginning of the modern Internet.
What is the purpose of age control software on the internet?
Age control software can help prevent children accessing inappropriate sites. Internet filters are an example of this – like we use here at school. At home, it might be software like Net Nanny or K9 Web Protection
What is the purpose of hyperlinks?
Sample Answer:
Hyperlinks are references to data that can be followed either by clicking or by hovering over text, an image or a graphic. Hyperlinks point to whole documents or to specific parts within a document. A highlighted word or picture in a document or Web page that you can click on with a computer mouse to go to another place in the same or a different document or Web page.
Alternative Sample Answers could include:
- Clicking text, a picture or other link in one document that takes, navigates, allows access, links the reader to a different document or part of the original document.
- A link from a hypertext document to another location, activated by clicking on a highlighted word or image.
What are the 3 main types of image compression file formats used on the internet?
GIF = Graphical Interchange Format -
(file extension = .gif)
- For line art (such as one or two colour logos), simple drawings (such as clipart), animations, and basically any image that has no gradients or blends. Gif is also the an excellent format to display an image with a transparent background
JPEG = Joint Photographic Experts Group
(file extension = .jpg or .jpeg)
- The best format for colourful, complex images (such as photographs), images containing gradients or colour blends, and any other images with millions of colours
- *PNG = Portable Network Graphic**
- *(file extension = .png)**
- PNG generally produces better looking images with smaller file sizes than GIF for the same kinds of limited colour images. Most Web designers now choose this format over GIF as most of todays browsers recognize the format. (older browsers don’t - IE6). PNG files tend to handle transparency better than GIF
What is the main protocol used for websites?
HTTP - Hypertext Transfer Protocol
What is the main protocol used for streaming videos on the internet?
The Real Time Streaming Protocol (RTSP) is a network control protocol designed for use in entertainment and communications systems to control streaming media servers.
When was the Internet created?
The Internet was developed in the late 1960’s. However, it didn’t start to take off until the mid 1990’s when the work of Tim Berners Lee led to the development of protocols linking hypertext documents on the World Wide Web.
Which language is used to provide basic instructions for the display of content in a web browser?
HTML = Hypertext Markup Language
Which of the following is the most effective way to add elements such as font, colours and spacing to web documents?
(A) Using cascading style sheets
(B) Scanning the elements into web documents
(C) Using compatible font, colours and graphics
(D) Sketching the required elements and copying them into place
(A) Using cascading style sheets
Which of the following statements is true of cascading style sheets (CSS)?
(A) A separate sheet must be created for each page of a website.
(B) They are memory intensive and can be slow to load.
(C) A single CSS file can be applied to an entire website.
(D) They enhance the website’s adaptability to be viewed in different browsers.
(C) A single CSS file can be applied to an entire website.
Outline THREE challenges faced by designers when creating multimedia content for the web.
Sample answer:
Designers need to consider a number of factors for web delivery including:
- Designing and creating content to suit available bandwidth
- Ensure compatibility across browser platforms
- Designing interfaces that will suit a number of devices and screen sizes.
Answers could include:
- Consideration of file size
- Protection against theft, piracy, copyright infringement
Outline the multimedia elements that need to be considered when adapting a computer based game for a handheld device.
Sample answer:
When adapting a game from a computer to a hand held device the game design should be suitable for the intended hardware, such as a smaller screen. Furthermore, the game design should consider user interactivity and ergonomics with respect to a smaller (touch) screen. As most hand held games are downloaded over the internet, software needs to be designed to ensure efficient file size of the app.
Answers could include:
The platform specific requirements should be identified (eg Android vs IOS vs PSP).
Describe the impact that an increased availability of bandwidth has had on the delivery of multimedia content online.
Sample answer:
Greater bandwidth has led to a number of positive and negative results. Traditional methods of delivery of video movies, such as DVD, have given way to video on demand services such as Netflix/Quickflix. This allows greater flexibility in when and where people watch these movies.
Music is now listened to and accessed online, therefore, online stores such as iTunes have increased availability of music at generally lower prices. Disadvantages include increase in digital piracy that results in decreased income for authors of digital content.
Describe the differences between video streaming using hypertext transfer protocol (HTTP) and real time streaming protocol (RTSP).
Sample answer:
RTSP
- Only a small packet of the file is cached
- Better for long movies
- Can do live streaming: ‘live broadcast’
HTTP
- File cached to computer
- Replay is easy
- Can’t do live streaming
Alternative Answer could include:
RTSP makes a lot more efficient use of bandwidth as you are only using bandwidth for parts of the video that are actually watched as opposed to HTTP delivery where the whole file gets delivered.
