Topic 5.1 Flashcards
Define Internet
- the world wide interconnection of networks
Define world wide web
- a massive colleciton of web pages based on hypertext transfer protocols (http, https)
web browser
-software that connects to a domain name server (DNS) to locate IP addresses
-interprets HTML
HTML
-hypertext mark up lnguage
-language used to design and format web pages to write http(s) protocols
URL
-uniform resource locator
-text based address for a web pag
http
-hypertext transfer protocol
-set of rules followed when trasnferring files across the internet
https
-hypertext transfer protocol secure
-http with extra security applied (SSL/TLS)
hyperlink
text/image that links to further text/image/website through clicks
DNS
-domain name server
-a server that looks up domain names for websites to find the IP address
cookie
text file sent from a website to a user’s browser to remember user preferenes or other personal information
session cookie
-stored temporarily on a computer; deleted when the browser is closed
-doesn’t collect information from the user’s computer
-doesn’t personally indentify a user
persistent cookie
-stored on the user’s hard drive and only deleted when expired or manually deleted
Describe the contents of a website address [5]
-domain host (www)
-domain name (website name)
-domain type (.com.org.net.gov)
-country code (.uk.de.cy)
-path/file name (/drive C/public/ict/homework)
features of web browsers [6]
-home page
-bookmarks
-history
-forward/backward button
-tabs
-use cookies
How DNS is used to locate and retrieve a web page
-user types url in browser and asks
-DNS 1 for the IP address
-DNS 1 doesn’t have, so asks DNS 2
-DNS 2 finds IP address and sends it to DNS 1
-DNS 1 saves IP address
-DNS 1 sends it to user
-computer downloads pages (HTML files) then interprets
