Unit five- Internet and it Uses

Question 1

Internet

Answer 1

Global network of interconnected computers

Question 2

World Wide Web

Answer 2

Part of the internet which users can access using web browser, it is a large collection of web pages

Question 3

Web browser

Answer 3

Software that allows users to access & display web pages on their device screens. They interpret HTML sent from websites

Question 4

URL format

Answer 4

Protocol://website address/path/file name

Question 5

Protocol

Answer 5

http/https

Question 6

Website address format

Answer 6

domain host- www
domain name - website name
domain type - .com, .org, .net, .gov
And sometimes country code - .uk, .de, .cy

Question 7

What does HTTP and HTTPS stand for

Answer 7

Hypertext transfer protocol (secure)

Question 8

Functions of a web browsers (9)

Answer 8

have a home page
store users favourite website / web page as bookmarks
history of websites
allow users to go forwards & backwards on a website
allows many web pages to be open at the same time using tabs
they make use of cookies
they make use of hyperlinks
Data is stored as a cache
provide address bar

Question 9

DNS servers

Answer 9

A server that converts domain names to IP addresses

Question 10

Cookies

Answer 10

Cookies are small data’s that get stored on a users computer which are sent by web servers to the browser, they hold key info preferences like language1 currency and previous browser activity

Question 11

What are the two types of cookies

Answer 11

-Session cookies - ceases to exist when the browser is closed
- persistent cookies - permanently stored on the hard drive

Question 12

What is digital currency?

Answer 12

Money that exists only in digital format, no physical forms

Question 13

What is digital currency used for?

Answer 13

Accepted form of payment to pay for goods or services
- like cash, credit/debit, digital currency can be transferred between accounts.

Question 14

True or False: Digital currency relies on a central banking system

Answer 14

True

Question 15

What is the problem with centralization

Answer 15

• maintaining confidentiality + security

Question 16

What is cryptocurrency?

Answer 16

A decentralized type of digital currency

Question 17

How does crypto currency work?

Answer 17

• uses cryptography to track transactions
• crypto currencies are publicly available, all transactions can be tracked
• works with a blockchain network, it is more secure.

Question 18

What is cryptography?

Answer 18

a method of protecting info and communications through codes

Question 19

What is Block chaining?

Answer 19

-it is a decentralized database.
- all transactions of the networked members are stored here
- they have a number of interconnected computers but not connected to a central server
-when a new transaction takes place, all networked comps get a copy of it
–> this mitigates hacking

Question 20

How does block chaining work?

Answer 20

• a new block is created when a new transaction takes place
• a new hash value is created each time and is unique to other blocks
• a hash value also includes timestamps

Question 21

What does a block in the block chain contain?

Answer 21

Data- name of both sides, amount…
Hash value- unique value generated by algorithm
Prev Hash value- points back to the previous block in the chain

Question 22

differences between cryptocurrency and digital currency

Answer 22

• crypto currency uses cryptography to track transactions
• cryptocurrency is decentralized unlike digital currencies
• digital currencies are regulated by bands and govs but cryptocurrency is not
  -crypto currencies are publicly available, digital currencies are not
• cryptocurrency uses block chaining, digital currency does not