COMPUTER SECURITY

 QUESTION AND ANSWER

Chapter -3

COMPUTER SECURITY

1)      What is computer security?

Ans: The security given to the computer for the protection of hardware, software and data from being lost or damaged due to accidental or intention harm is known as computer security.

2)      What is hardware security?

Ans: The security given to the various hardware tools or equipment from being lost or damaged due to accidental or intention is known as hardware security.

3)      List some of the hardware security measures.

Ans: Some of the hardware security measures are:

i) Regular maintenance

ii) Insurance Policy

iii) Power Regulator Device

iv) Fire detectors

v) Protection from theft

4)      What is software security?

Ans: The security given to the software and data from being lost or damaged due to accidental or intentional harm is called software security.

5)      List some of the software security measures.

Ans: Some of the software security measures are:

i) Backup

ii) Scandisk

iii) Defragmentation

iv) Password

6)      What is voltage regulator device? Give example.

Ans: A voltage regulator device is an electronic regulator device designed to automatically maintain a constant voltage level.

E.g.: UPS, Spike guard, Volt guard, etc.

7)      Why is power protection device needed in a computer system?

Ans: Power protection device is needed in a computer system to protect the computer system from damage and expensive data loss.

8)      What is UPS?

Ans: A UPS is a device that allows computer to keep running for at least a short time when the primary power source is lost. It provides continuous power supply to the computer system and protects them from power surge and voltage fluctuation.

9)      What is password?

Ans: A password is a secret word or phrase that gives a user access to a particular program or system.

10)  What should be done to protect the system form unauthorized access?

Ans: To protect a system from unauthorized access, password should be kept in a system which provides security to the system. A password should be difficult to guess and determine and should be changed regularly and memorized.

11)  What is backup?

Ans: Backup is a copy of a file which is used in the event of the original file being corrupted.

12)  Why is backup vital to computer system?

Ans: Backup is essential to computer security system to save the important data and programs from accidental and intentional harm. They are stored in different storage devices like hard disk, CDs and pen drives. When the data and software gets lost or damaged the backup system helps to recover the lost or damaged data or software from the backup copy of data and software.

13)  How can software prevent data loss?

Ans: Software prevents the data loss by the following ways:

i) Antivirus software can detect and remove virus from the computer.

ii) Scan disk checks folders, bad sector and other error of the disk and fix them.

iii) Software for backup helps in securing the information by keeping backup.

14)  What is scan disk?

Ans: Scan disk is a process which involves in maintaining the disk files and folders, bad sectors, lost clusters, lost chains and other errors of the specific disk and it can fix them if it is possible.

15)  What is defragmentation?

Ans: The process of re-writing parts of a file to continuous sector on a hard disk to increase the speed of access and retrieval.

16)  What is fragmentation?

Ans: The scattering of the parts of the same disk file over different location is called fragmentation.

17)  What is password policy?

Ans: A set of rules designed to enhance computer security by encouraging user to employee strong passwords and use them properly is called password policy.

18)  What is importance of UPS in computer security system?

Ans: The importance of UPS in computer security system is that it controls fluctuation of electric voltage and provides enough backup electric power to the computer system when there is power failure.

19)  Why is backup vital to computer system?

Ans: Backup is vital to computer security system in order to save the data from being lost or damaged due to accidental or intention harm. When data and software are lost or damaged, we can easily recover through backup.

20)  Write any four criteria for a strong password.

Ans: Any four criteria for strong password are:

•         Do not keep a password which can be easily guessed such as date of birth, nickname, etc.

•         Do not keep word as password that is currently popular.

•         Keep a password with mixture of alphabet and numbers which is difficult to guess.

•         Keep changing your password regularly.