Answer:
C. corrective
Explanation:
Security controls
These are actions or measures taken to maintain and/ or restore the security of the system. Security controls are categorized as corrective, preventive and detective, which are discussed below.
Corrective
Security controls which help in taking the corrective steps after the malicious activity has done damage to the system or restoring the security of the system are called corrective security controls.
These controls also act as preventive measures for future risks.
These controls perform the healing and have remedial action for the damage done to the system.
Once the system has been recovered, appropriate measures are put in place to avoid further damage.
The damage can be done to the computer system, its hardware and software resources or the data.
Examples include restoring the database from the backup file.
Updating or renewing antivirus software rectifies the security against virus.
For example, once the database has been restored, access control, antivirus and other measures are employed to prevent the database from being corrupted and to prevent system from being affected.
Preventive
Security controls which help in stopping the malicious activity from harming the system are called preventive security controls.
As per the name, these measures are employed to prevent any security breach.
These measures prevent any suspicious activity from taking place which may cause harm to the system.
Firewalls prevent unauthorized access.
Antivirus prevents malicious applications from running.
Login feature to give access only to authorized user.
Detective
Security controls which help in detecting the malicious activities and alerting the security personnel are called detective security controls.
As per the name, these measures are used to identify any suspicious activity and report them. Detective controls do not prevent or correct any security breach.
Alarms are employed to detect and alert any suspicious activity.
Intrusion detection system (IDS).
In an ideal situation, security controls are a combination of all the types mentioned above.
