Systems Security Finished

Question 1

what is the disadvantage of a network working on the principle of communication and sharing

Answer 1

data has the ability to be accessed by unauthorised people

Question 2

what are the four types of network attack (+explanation)

Answer 2

active - where the hacker tries to modify data on their own remark (DOS)
eavesdropping - where the hacker monitors a network in order to gather information (wiretapping)
external - where someone outside of an organisation tries to hack its network
internal - where someone within an organisation attempts to hack its network

Question 3

what is a virus

Answer 3

programs embedded within other files. they replicate themselves and become parts of other programs. they cause damage by deleting or modifying data

Question 4

what is a worm

Answer 4

programs similar to viruses except that they are not hidden within other files. often spread through emails

Question 5

what is a trojan

Answer 5

programs which pretend tp be legitimate but are actually malware. usually spread through email

Question 6

what is spyware

Answer 6

programs that monitor user activities and send info back to the hackers

Question 7

what is ransomware

Answer 7

programs that attempt to trick the user into paying a ransom by either using scare tactics or encrypting documents

Question 8

what is phishing

Answer 8

emails that trick users into giving away personal information

Question 9

what is a brute force attack

Answer 9

where a program is used to find a password by trying all possible combinations

Question 10

what is a DOS attack

Answer 10

where a computer s used to prevent a server from performing tasks by bombarding it with requests

Question 11

what is data interception and theft

Answer 11

stealing data while it is being transmitted

Question 12

what is SQL injection

Answer 12

some databases use SQL to store their data so when SQL is inputted it can cause errors

Question 13

what is the purpose of pen testing

Answer 13

determine how resilient a network is against an attack

Question 14

what is network forensics

Answer 14

monitoring the traffic on a network. data packets are copied at regular intervals where it is processed and assessed for malicious activity

Question 15

what is a network policy + 5 examples

Answer 15

a policy set by the network manager to keep the network safe
users have a secure, hard to guess password
users cannot connect unauthorised equipment
access levels are given
a regular backup procedure is in place
regular pen testing and forensics

Question 16

what are user access levels

Answer 16

they determine what facilities a user has access to

Question 17

what is encryption

Answer 17

the process of disguising data so it cannot be understood

Question 18

what are the purposes of anti-malware software (3)

Answer 18

to detect malware that has been installed
to prevent malware from being installed
to remove malware from the system

Question 19

what is the disadvantage of anti-malware software

Answer 19

it is reactive so it can only detect known malware

Question 20

what is a firewall

Answer 20

a tool that monitors traffic going in and out of a network