Web Technologies

• HTML


  defines the structure and contents of a web page
• CSS


  defines the style and appearance of a web page

  uses selectors such as classes/Ids

  can be placed within HTML
• State what is meant by damping factor


  the probability that a user will not follow a link, a value between 0 and 1
• Factors that affect the output value given by the PageRank algorithms for a website

  Number of links to target site, pageRank score of those sites
• Explain the difference between HTML id attribute and a HTML class attribute

  Only one element can have a given id, it is unique whereas a class can be used assigned to multiple elements and used multiple times.
• HTTPS


  http secure, encrypts and decrypts user page requests as well as the pages that are returned by the web server
• What is a NIC and what is it's role?


  network interface card connects a device to a wired or wireless network connection

  uses a protocol to ensure successful communication
• Where is code executed in client-side processing?

  within local browser
• Client-side processing


  Operations that are performed by the local device in a client-server relationship in a computer network
• How does PageRank algorithm work?

  By counting the number and quality of links to a page to determine a rough estimate of how important the website is
• What is the assumption made in PageRank algorithm?

  More important websites are likely to receive more links from other websites
• What does search engine indexing do?

  decides relative importance of the page
• How does search engine indexing work?

  A crawler looks at each page on a website examining data in headers and words within the page to add them to a database to be used for searching
• What is server side processing?

  Operations that are performed by the server in a client-server network
• Example of server side processing?


  Receiving a SQL query from a client, processing it and returning the results.
• How does processing compare between server-side and client-side processing?

  In client-side processing data isn't sent back and forth but in server-side processing data is sent from the browser to the server then back after processing it
• What is server side processing usually used for?

  Generating the webpage content dynamically in response to client requests
• What affects PageRank? 


  • number of sites that link to their site
  • pagerank of the linking sites
  • number of outward links from the site