DF347 Networks Forensics Quiz
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Questions and Answers

What is a key measure to minimize accidental contamination during evidence handling?

  • Using standard envelopes for evidence packaging
  • Isolating bulk and trace evidence (correct)
  • Storing evidence in open containers
  • Assigning multiple people to handle evidence

    • Which of the following is essential for maintaining the integrity of evidence?

  • Keeping evidence in closed boxes until needed
  • Mixing samples to verify testing
  • Assiduous use of logging systems (correct)
  • Omitting note-taking for efficiency

    • How can the accidental mislabeling of evidence be minimized?

  • Relying on verbal descriptions instead of written labels
  • Incorporating specific SOPs designed for labeling (correct)
  • Allowing anyone to label their own evidence
  • Using disposable labeling materials

    • What is an effective way to prevent cross-contamination between samples?

    <p>Employing decontamination procedures for surfaces and people</p> Signup and view all the answers

    What role does contemporaneous note taking play in evidence handling?

    <p>It serves to demonstrate compliance with SOPs</p> Signup and view all the answers

    What role can a dedicated exhibits officer play in the evidence chain?

    Signup and view all the answers

    What is the primary objective of forensic science in the context of a criminal investigation?

    <p>To establish guilt or innocence of suspected individuals</p> Signup and view all the answers

    Which phase in evidence processing involves the examination and laboratory work on recovered evidence?

    <p>Examination and laboratory analysis</p> Signup and view all the answers

    What is critical to maintaining the integrity of physical evidence collected from a crime scene?

    <p>Properly documenting and securing the evidence</p> Signup and view all the answers

    What does the term 'chain of custody' refer to in forensic investigations?

    <p>The chronological documentation of evidence handling</p> Signup and view all the answers

    Which type of evidence may be collected during a forensic investigation at a crime scene?

    <p>Various types including DNA, fingerprints, and digital evidence</p> Signup and view all the answers

    What is the first step in processing physical evidence from a crime scene?

    <p>Recovery and continuity of evidence</p> Signup and view all the answers

    Which of the following processes ensures that forensic evidence is trustworthy and relevant to law enforcement?

    <p>Quality standards and ethical oversight in forensic practice</p> Signup and view all the answers

    What is an essential consideration when packaging evidence from a crime scene?

    <p>Ensure the packaging prevents contamination or damage</p> Signup and view all the answers

    What is the primary responsibility of Scenes of Crime Officers (SOCOs)?

    <p>To identify and recover items of physical evidence</p> Signup and view all the answers

    What is a critical aspect of maintaining evidence integrity?

    <p>Documenting the chain of custody accurately</p> Signup and view all the answers

    Which component is NOT necessary for ensuring continuity of evidence?

    <p>Signatures not required on evidence seals</p> Signup and view all the answers

    What does the term 'chain of custody' primarily ensure?

    <p>The legal admissibility of evidence in court</p> Signup and view all the answers

    What procedure can help prevent evidence tampering?

    <p>Implementing tamper-evident seals on packaging</p> Signup and view all the answers

    What must be done whenever evidence is handled to maintain its integrity?

    <p>Document who handled it and when</p> Signup and view all the answers

    Why is it important to guard against evidence contamination?

    <p>It may lead to evidence being declared inadmissible</p> Signup and view all the answers

    What procedure helps maintain security during evidence handling?

    <p>Securing packaging while documenting the handling process</p> Signup and view all the answers

    Study Notes

    DF347 Networks Forensics

    • Course: DF347 Networks Forensics
    • Semester: 1
    • Academic Year: 2024/2025
    • Dates: October 13th - 17th, 2024
    • Instructor: Dr. Basil Elmasri
    • Email: [email protected]

    Computer Networks Layers

    • TCP/IP protocol suite and OSI 7-layer model are presented.
    • The TCP/IP model is a hybrid model combining the layers.

    Encapsulation and Decapsulation

    • Data is encapsulated with headers at each layer of the model.
    • Headers are added at each layer (application, transport, network, data link, physical).
    • Each layer adds its header to the data before sending it to the next layer.
    • The process of unpacking the headers is known as decapsulation.
    • The process of packaging the data with headers at each layer is called encapsulation.

    Encapsulation and Decapsulation Example

    • Server A sends a webpage to B.
    • The webpage is broken into chunks.
    • Headers are added to each chunk—HTTP, TCP, IP, MAC—along with a trailer.
    • The frame is converted to bits (0s and 1s).
    • The bits are sent through the network.
    • PC B receives the bits and unpacks the headers (decapsulation).
    • The webpage is assembled by removing the headers.

    Forensic Science

    • Forensic science is the application of science to the justice system.
    • It aims to resolve both civil and criminal cases.
    • Forensic science commonly involves criminal case investigations.
    • It is used to associate people, places, and things to criminal activities.
    • The discipline divides into distinct parts, like the definition itself.

    Evidence Processing

    • Crime scene investigation starts with evidence processing.
    • Three phases are typically involved: recovery, examination, and interpretation.
    • The recovery involves gathering evidence.
    • Examination involves detailed analysis in a lab.
    • Interpretation is the process of determining the meaning of the evidence found.

    Recovery and Continuity of Evidence

    • Integrity of evidence is crucial.
    • Documentation of each evidence step is required.
    • The chain of custody records who handled the evidence, when, and how.
    • Records must track who handled the evidence, keeping track of contamination, deterioration, and mislabeling.
    • Courts require a documented and uninterrupted chain of custody.

    Loss of Integrity

    • Includes tampering, accidental contamination, deterioration, and accidental mislabeling.
    • Proper packaging and storage are crucial.
    • Use of tamper-evident seals and secure evidence storage is important.
    • Documentation needs to be preserved throughout the process.

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    Related Documents

    DF347 Networks Forensics 2024/2025 PDF

    Description

    Test your understanding of the encapsulation and decapsulation processes in computer networks. This quiz covers the TCP/IP protocol suite and the OSI 7-layer model as discussed in the DF347 Networks Forensics course. Evaluate your knowledge on how data is transmitted across different layers of the model.

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