Is a hacker with minimal technical skill who primarily uses existing attack toolkits.

Computer Security:Principles and Practice, 3rdEditionChapter 8csdChapter 8 – Intrusion Detection1.  An intruder can also be referred to as a hacker or cracker.

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2.  Activists are either individuals or members of an organized crime       

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                 group with a goal of financial reward.3.  Running a packet sniffer on a workstation to capture usernames and

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     passwords is an example of intrusion.4.  Those who hack into computers do so for the thrill of it or for status.

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5.  Intruders typically use steps from a common attack methodology.

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6.  The IDS component responsible for collecting data is the user interface.

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7.  Intrusion detection is based on the assumption that the behavior of the  

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intruder differs from that of a legitimate user in ways that can be        quantified.8.  The primary purpose of an IDS is to detect intrusions, log suspicious 

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      events, and send alerts.9.  Signature-based approaches attempt to define normal, or expected, 

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behavior, whereas anomaly approaches attempt to define proper       behavior.10.  Anomaly detection is effective against misfeasors.

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11.  To be of practical use an IDS should detect a substantial percentage of

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       intrusions while keeping the false alarm rate at an acceptable level.12.  An inline sensor monitors a copy of network traffic; the actual traffic 

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       does not pass through the device.13.  A common location for a NIDS sensor is just inside the external 

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       firewall.14.  Network-based intrusion detection makes use of signature detection 

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Which approach to IDS involves an attempt to define a set of rules or attack patterns that can be used to decide if a given behavior is that of an intruder?

Have a research about the difference masquerader hackers and clandestine user and tell something about it?

Is an individual who is not authorized to use the computer and who penetrates a systems access control to exploit a legitimate user account?

Is running a packet sniffer an example of intrusion?