network security threats

Question 1

what is a virus?

Answer 1

a localised piece of malware that can corrupt a system or change data which may cause it to stop working. it is only activated when opened by a human and from there it attaches to files; infecting them.

Question 2

what is a worm?

Answer 2

malware that can replicate itself and spread through systems by finding weaknesses in software. It does not need an infected file or human interaction to spread.

Question 3

What is a Trojan horse

Answer 3

A harmful program that looks like legitimate software. It gives the attacker backdoor access to the system but they don’t self replicate

Question 4

what is spyware?

Answer 4

Secretly records activities of a user on a computer whether aim is to record personal info. All recorded info secretly pass back to the attacker.

Question 5

What is a keylogger

Answer 5

Secretly record is the key presses of a news on a computer where the aim is to record personal information. They can be downloaded or plugs into the USB port.

Question 6

What is Ransomware

Answer 6

Looks falls on a computer system so that the user can no longer access them. From here the attacker demands money from the victim.

Question 7

What is an SQL injection?

Answer 7

Structured query language is a programming language used for manipulating data and databases. It is a malicious command that is entered into the data input box to receive unauthorised access to the website’s database.

Question 8

What is a DOS attack?

Answer 8

When a computer repeatedly sends requests to a server to overload the system this will end up slowing the system down and may take the website off-line.

Question 9

What is a DDOS attack

Answer 9

When a botnet of infected systems overload a server with requests. a botnet is a large group of devices controlled by the attacker.