1. Intrusion detection
Lewis Knight

2. What is it?
An intrusion detection system is used to detect any intrusion attempts on a computer system or network. This device/software will monitor a network or system activities for any malicious activities or policy violations.
If any malicious actions are detected then it’s the intrusion detection’s job to inform the systems defence system to act upon it

3. Where is it used?
Intrusion detection systems can be used on system networks and computers, to add security if any malicious actions are taking place.
Intrusion detections can also come in the form of a actual physical device. These devices can range from security cameras all the way to laser trip wires.

4. Why?
If intrusion detection systems were not being used then malicious attacks could occur and the business/company would not be aware of what is going on and they could be losing money and or customers if people found out that there systems were not secure.

5. Benefits?
The benefits to having this detection system is that you can catch and prevent attacks from malicious hackers with the intent to damage or steal information stored on a company’s network.
If these attacks are caught and stopped then money and information would not be stolen saving the business money time and effort.

6. Disadvantages?
The disadvantage to this system is it can cost a lot of money that smaller businesses may not be able to afford. This includes both the software side and hardware side.
If you have a passive detection system then it is the IT managers job to check regularly to see if any attacks have been made, where as an active system will inform the defence program to come into action.

7. Example?
Intrusion detection systems these days tend to come attached to virus management programs so that they can inform each other about the attacks and act upon it with no lag and eliminate the issue.