The alarm has already gone off
Smoke rises in the server room. A lock and a camera cannot help now. The harm has started.
What you need now is a control that limits the damage and stops it happening again. Today you meet the corrective kind.
Key words
| Word | What it means |
|---|---|
| Corrective control | A safeguard that limits harm after a problem starts, and stops it coming back. |
| Fire suppression | Putting out a fire. |
| Sprinkler | A device that sprays water when it senses fire. |
| Gas suppression | Putting out a fire with gas, not water. |
| Inert gas | A gas that lowers the oxygen in a room so a fire cannot burn. |
| Chemical agent | A gas that stops the chemical reaction of a fire. |
| Malware | Software made to do harm. |
| Disaster recovery plan | A written plan for how to respond to an unplanned event. Short form: DRP. |
| Quarantine | Moving a harmful file to a safe place where it cannot run. |
| Patch | A small update that fixes a security problem. |
| Standard operating procedure | A written set of steps for a job. Short form: SOP. |
The cells students fill in are left blank in this preview.
By the end of this lesson
Note
I can explain the purpose of corrective controls and name physical, technical and procedural examples.
Starter: what you already know
Have a go
Starter: what you already know
3 questionsYour answers are marked here and are not kept. A college account keeps every student’s marks.
The purpose of corrective controls
A corrective control has two jobs. It limits the damage after a problem starts. And it limits the chance of the problem happening again.
It comes after prevention has failed or been beaten.
Physical: fire and gas suppression
Fire suppression uses sprinklers and extinguishers. Water can ruin computers, so server rooms often use gas suppression instead.
An inert gas system lowers the oxygen in the room. A chemical agent system stops the fire's chemical reaction. Neither one soaks the equipment. People must leave when the alarm sounds.
Technical: patch, disconnect, quarantine
Patching fixes the weakness that was used, so the attack cannot work again.
Disconnecting an infected system cuts it off, so the harm cannot spread.
Quarantining a virus moves it to a safe place where it cannot run.
Check: physical and technical
Have a go
Check: physical and technical
4 questionsYour answers are marked here and are not kept. A college account keeps every student’s marks.