1.3.4

Cards (12)

  • client side processing 

    all information is processed on the clients computer
    it is visible to users
    e.g java script
  • benefits of client side processing
    reduces load on server
    reduced amount of web traffic
    improves security as it avoids unnecessary data transfer
  • server side processing
    used for more complex processing where results are required more quickly
    processes are executed on the web server
  • benefits of server side processing
    provides further validation
    can perform complex calculations
    keeps organisational data secure as contents do not need to be downloaded on users device
    processes data faster
  • search engine index

    indexing is the process of collecting, sorting and storing data in a search engine index
    index is continually updated through web crawlers
  • how do web crawlers work

    index any page or content they find and map links between pages by following all the internal and external links
    records the information and position of each word within the page sorting them into an index
  • page rank algorithm
    first page sorting algorithm, complies and ranks website pages
    works by checking number and quality of links to a page in order to determine its importance
  • HTML defines the structure and content of a web page using tags enclosed in <>
  • CSS defines style and appearance using selectors such as classes
    can be placed within HTML or externally in a file
  • HTML code to implement hyperlink from an image

    <a href = "booking.htm" ><img src = "ticket.png"></a>
  • damping factor
    number between 0 and 1 that is the probability a user will not follow a link
  • factors that affect the output value given by the PageRank algorithm
    number of links to target site
    PageRank score of those sites
    damping factor