Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
A financial company processes stock trades. To ensure that a trader cannot later deny having submitted a specific trade order, the system captures a digital signature from the trader for each order. Which security goal is being addressed by this practice?
Answer choices
Why each option matters
Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.
A
Distractor review
Confidentiality
Confidentiality ensures data is not disclosed to unauthorized parties. Digital signatures do not primarily protect confidentiality.
B
Distractor review
Integrity
While digital signatures can provide integrity by detecting tampering, the primary goal in this scenario is to prevent the denial of actions.
C
Distractor review
Availability
Availability ensures systems and data are accessible when needed. Digital signatures do not address availability.
D
Best answer
Non-repudiation
Non-repudiation ensures that an individual cannot deny having performed an action or sent a message. Digital signatures provide non-repudiation by binding the action to the signer.
Common exam trap
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Technical deep dive
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
- Static NAT maps one inside address to one outside address.
- PAT allows many inside hosts to share one public address using ports.
- Inside local and inside global describe the private and translated addresses.
- NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
- Identify inside and outside interfaces first.
- Check whether the scenario needs static NAT, dynamic NAT or PAT.
- Do not confuse NAT matching ACLs with normal packet-filtering intent.
Related practice questions
Related SC-900 practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
More questions from this exam
Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.
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Question 5
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Question 6
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FAQ
Questions learners often ask
What does this SC-900 question test?
Static NAT maps one inside address to one outside address.
What is the correct answer to this question?
The correct answer is: Non-repudiation — Non-repudiation is a security goal that prevents individuals from denying their actions. Digital signatures provide both authentication and non-repudiation by linking a signature to the signer's private key.
What should I do if I get this SC-900 question wrong?
Then try more questions from the same exam bank and focus on understanding why the wrong options are tempting.
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