Network Security

Uses a number of computers over a network of infected machines which send req uests to a website which would bring it offline

• SQL

• DoS

• WLAN

• USB

Data travels across networks in

• Nibbles

• Parts

• Bytes

• Packets

How do hackers use viruses?

• To make a computer unusable

• To get someone’s personal information

• To find out card details

• All of the above

What must a user need to decrypt a file?

• Coin

• Key

• Token

• Graph

What is encryption?

• Where only the sender and recipient can read the message.

• A method of bypassing viruses

• A form of anti-virus

• Where data is translated into code so that only authorised users, or users with the key can decrypt it.

Software that performs a ‘barrier’ between a potential attacker and the computer system.

• Antivirus

• Firewall

• Windows update

• Disk defragmenter

Sending requests to a single server using hijacked machines

• Phishing

• DoS

• Worms

• Virus

What is the purpose of a firewall in computer security?

• To clean the computer screen

• To prevent unauthorized access to or from a private network

• To speed up the computer's processing

• To organize files on the computer

What is the purpose of encryption in data security?

• To make data more visible to everyone

• To protect data by converting it into a code that can only be read by authorized users

• To slow down the computer's performance

• To delete data permanently

Which of the following is a symmetric encryption algorithm?

• • a) RSA

• • b) ECC

• • c) AES

• • d) DSA