Network Security

Question 1

What is the Internet Protocol Address

Answer 1

Unique number, used to identify every device connected to the Internet
No 2 IP addresses are the same
If your computer requests a webpage, your computer’s IP address specifies where that web page should ultimately be delivered

Question 2

What are 4 methods of filtering?

Answer 2

Authentication
Encryption
Firewalls
MAC address filtering

Question 3

What was authentication

Answer 3

Measures to make sure that a person is trying to access data is who they say there are

Question 4

Examples of authentication techniques

Answer 4

Usernames and passwords
Memorable information, such as their mother’s maiden name
Checking that they are using a recognised IP address

Question 5

What is encryption

Answer 5

Scrambling data using a key to ensure that it makes no sense to anyone who intercepts it

Question 6

How does encryption work?

Answer 6

When scrambled data is received, recipient also has a key, which can be used to decrypt the data, returning it to readable format

Question 7

What are firewalls

Answer 7

Block certain traffic (such as emails from a suspect IP address)
Or
Only allow certain traffic (such as from a single, trusted device), blocking everything else

Question 8

What can firewalls be

Answer 8

Software or hardware

Question 9

What is a MAC address

Answer 9

Media Access control address which cannot be changed

Based on this unique identifier, specific devices can be either permitted onto, or blocked from, a network