Web Application Terms
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- Created by: gepentland053
- Created on: 18-10-19 09:47
The Internet
- A global computer network
- Consists of interconnected networks
- Using communication protocols
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WWW (World Wide Web)
- A system of interlinked hyprtext documents
- Accessed via the internet using a browser
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URL (Uniform Resource Locator)
- A unique address
- Identifies every resource on the internet
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HTTP (Hypertext Transfer Protocol)
- A protocol which defines how data is transferred over the internet
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IP Address
- A unique physical address of each computer linked to the internet
- Either static or dynamic
- Contains a group of 4 numbers separated by a dot
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Web Browser
- An application running on a user's computer
- Requests text and graphics of webpages from the web server on the internet
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Web Server
- Provides webpages/resources in response to requests from web users
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Web Hosting
- Allows an individual/organisation to make their website accessible via the WWW
- Provides space on a server owned/leased for client use
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FTP (File Transfer Protocol)
- Protocol for the transfer of files across the internet to the web server
- Users can access a server request for a file to be downloaded
- Alternatively - upload the file to the web server where they are stored
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ISP (Internet Service Provider)
- Provides user with a range of services
- Has direct links to the internet
- Accepts transmissions from users over commmunication lines and passes these onto the internet
- Sells internet to individuals/companies + provides access to web servers
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Search Engine
- Web based tool that searches for information using key words or criteria
- Use of a 'spider' or 'webcrawler'.
- The program 'crawls' thorugh the web + constructs an index of pages based on metadata embedded in the head
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Cache
- Situated closest to the processor
- Allows browsers to download images, data & documents for faster viewing in the future
- A local copy of the information is kept, therefore the browser is able to load at least some information without a download
- Loading time decreases
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Cookies
- Small files downloaded to a computer when visiting a website
- Previous activity and user preferences is stored
- This information can be used when the user visits the site again
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Portal
- A website that acts as a main entry point to a group of web services
- Requires user to log on and provide a range of services e.g. email & links to other sites
- Example: Yahoo.com
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Website
- A collection of HTML pages
- Linked together on the world wide web
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Webpage
- A page of information stored on the WWW
- Usually written using HTML and viewed using a web browser
- Can contain hypertext - provides the user with clickable links to other webpages and multimedia, e.g. sound, video or animations as well as simple text.
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