5.1 the internet and the world wide web Flashcards
1
Q
difference between internet and world wide web
A
- internet is the infrastructure
- www is collection of websites/web pages accessed using internet
2
Q
what is URL
A
- uniform resource locator
- text-based address for web page
3
Q
format or URL
A
- protocol
- domain name
- web page/file name
4
Q
what does HTTP(S) stand for
A
hypertext transfer protocol (secure)
5
Q
purpose/operation of HTTP
A
- allow communication between clients and servers for website viewing
- receive data from server, send data to server
- set of rules that must be obeyed
- when transferring files across internet
6
Q
purpose/operation of HTTPS compared to HTTP
A
- same
- extra security
- encryption used during data transmission
7
Q
purpose of web browser
A
- render HTML
- display web pages
8
Q
what does HTML stand for
A
hypertext markup language
9
Q
functions of web browser
A
- storing bookmarks and favourites
- recording user history
- allow use of multiple tabs
- storing cookies
- providing navigation tools
- providing address bar
10
Q
how are web pages located, retrieved and displayed on a device when a user enters a URL
A
- browser asks DNS server for IP address
- DNS server finds URL and map it to correct IP
- puts IP address and associated URL into its database and cache
- IP address sent back to users computer
- computer sets up communication with web server
- requested web pages downloaded as HTML files, interpreted by browser
11
Q
what are cookies
A
- small files/code stored on users computer
12
Q
what are session cookies
A
- stored in temporary memory on computer
- cease to exist once browser closed/web session terminated
13
Q
what are persistent cookies
A
- stored on users hard drive
- only deleted when expiry date reached/deleted by user
14
Q
what are cookies used to do
A
- save personal details
- track user preferences
- holding items in online shopping cart
- storing login details
