Security precautions and Environmental impact

Question 1

Describe the energy use of computer systems and the implications on the environment

Answer 1

Computer systems require power, and they therefore consume energy which has a negative impact on the environment.

Question 2

List 3 ways you can reduce the energy useage of a computer?

Answer 2

Reduce brightness on monitors
Auto power down machine/monitor if not in use for a period of time or certain times
Use standby / sleep / hibernate mode to reduce power to the computer when not in use

Question 3

Explain how encryption is user to safely transmit data across the internet

Answer 3

Encryption is used to scramble data into an unreadable form when it is transmitted over the internet. Only the intended recipent is able to decode the messge

Question 4

How are messages transfered securely across ths internet

Answer 4

Encryption

Question 5

Describe the role of a firewall

Answer 5

A firewall restricts access to your network/computer.

The firewall decides what data is allowed through. block risky connections, or connections from specific computers (e.g. a hacker).
Firewalls protect against hackers, not viruses.

Question 6

Which security precaution would prevent unauthorised access to a system

Answer 6

Firewall

Question 7

Which security precaution would protect data intercepted by hackers during data transfer.

Answer 7

Encryption