5.1

Question 1

internet (2 marks)

Answer 1

-the word “internet” comes from INTERconnected NETwork (internet)

• the internet IS NOT tangible

Question 2

WWW (World Wide Web) 3 marks

Answer 2

• part of the internet that can be accessed using a web browser software
• it is a collection of webpages
• it is a way of accessing information using the internet

Question 3

internet vs the WWW

Answer 3

see ppt and memorize the table!

Question 4

URLs (3 marks)

Answer 4

• URL = uniform resource locators
• they are text addresses used to access websites
• website address = domain host (www), domain name (website name), domain type (.com, .org,..etc) +sometimes country code (.kr, .uk..etc)

Question 5

HTML (3 marks)

Answer 5

• contains structure and presentation
• structure holds : semantics (meaning), HTML tags, and structural mark-up
• presentation = the style of the document (using CSS)

Question 6

HTML tags

Answer 6

• defined by a start tag, content, and an end tag
• the ELEMENT is everything from the start tag to the end tag

ex. <tagname>content..</tagname>

Question 7

HTML tags (3 marks)

Answer 7

• defined by a start tag, content, and an end tag
• the ELEMENT is everything from the start tag to the end tag

ex. <tagname>content..</tagname>

Question 8

CSS ( 2 marks)

Answer 8

• CSS = cascading style sheet
• used to control the font and color (design) of your document

Question 9

http and https ( 4 marks)

Answer 9

• http = HyperText Transfer Protocol
• http = set of rules for transferring files across the internet
• https = http with a security feature
  (“s” stands for “secure”)
• https is slower than http

Question 10

SSL (3 marks)

Answer 10

• SSL = secure sockets layer
• protocol that allows data to be sent and received securely over the internet
• SSL encrypts data, it will show a padlock in the status bar

Question 11

4 features of SSL

Answer 11

uses encryption,
uses digital certificates,
makes use of public and private keys,
SSL data is meaningless without the key

Question 12

SSL in action

Answer 12

memorize the chart in ppt

Question 13

TLS ( 3 marks)

Answer 13

• TLS = transport layer security
• similar to SSL but more recent security system than SSL
• TLS layers = record layer, handshake layer

Question 14

Web browsers (3 marks)

Answer 14

• software that allows a user to access and display web pages
• features: homepage, can store bookmarks, multiple tabs, uses cookies
• how it loads: request, send, receive

Question 15

DNS server (3 marks)

Answer 15

• DNS = domain name server
• system for finding IP addresses for a domain name given in a URL
• DNS process involves more than 1 server

Question 16

Cookies (4 marks)

Answer 16

• cookies = small files or code stored on a user’s computer
• two types of cookies = session cookie, persistent (permanent) cookie
• session cookies: used when making online purchases, they are erased once the session is terminated
• persistant (permanent) cookies: remembers a user’s login details, stored in the hard drive, remain in operation even after website session termination, used in financial transactions

Question 17

how do cookies work diagram

Answer 17

memorize from ppt