SLR12 Flashcards
(30 cards)
What does HTML stand for
HyperText Markup Language
When writing in HTML code. How do you enclose tags correctly eg body
<body> = </body>
What does CSS stand for
Cascading Style Sheets
What does CSS do
Describes how HTML elements should be displayed on screen
Can you edit how HTML looks without CSS
Yes
Why is CSS more efficient
You can amend multi HTML pages in one go
How do you link a CSS document to HTML documents
<link></link>
How was the internet founded
In 1969 by the US department of defence where 4 computers were connected together and this was known as ARPANET
How many computers are connected now in 2020
An estimated 50,000,000
What does WWW stand for
World Wide Web
When you search something into the internet how does it check against the massive amount of potential results, resources and websites that are on the internet
Search engine indexing
How do search engines travel over the WWW
Spiders and crawlers
What does the pagerank algorithm do
Checks the number of links to a page to determine how important it is
In pagerank what does PR(A) mean
The pagerank of page A
In pagerank what does c(Tn) mean
The total number of links from n including the inbound link to page a
In terms of pagerank what does d stand for
D is the dampening factor which is used to stop other parts of the algorithm having to much influence
In the pagerank algorithm what is d nationally set to
0.85
There are two types of processing for dynamic web pages
Server-side
Client-side
What are the pros of client-side processing (5)
- Initial data validation (JavaScript)
- Manipulates user interface element
- Applies website styles (CCS)
- Reduces load on the server
- Reduces the amount of web traffic
What are the pros server-side processing (5)
- Provides further validation
- Queries and updates the server database
- Encodes data into readable HTML
- Keeps organisation data secure
- Performs complex calculations
What is the purpose of compression
To reduce the file size of an item to make better use of storage space and optimise bandwidth
What are the two types of compression
Lossy and lossless
What is the process of lossy compression
Deletes data to reduce the size of the file
Which file types are good for lossy compression
Audio and visual
