Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
A branch office needs to send a confidential design document to headquarters over an untrusted network. Headquarters already has the public/private key pair available for document exchange. Which method is most appropriate to keep the file confidential during transit without first sharing a secret key?
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
Best answer
Encrypt the file with headquarters' public key
Only headquarters can decrypt the file with its matching private key, preserving confidentiality in transit.
B
Distractor review
Publish a hash of the file for comparison
A hash can verify integrity, but it does not encrypt the document or protect confidentiality.
C
Distractor review
Sign the file with the branch office private key only
A signature proves origin and integrity, but it does not keep the contents secret from eavesdroppers.
D
Distractor review
Compress the file before sending it
Compression changes size and format, but it does not provide any cryptographic protection.
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.
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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.
Question 1
A laptop is suspected of being used in a malware incident. It is still powered on and connected to Wi-Fi. What should the responder do before shutting it down?
Question 2
An employee reports a ransomware note on a file server. The server is still powered on, shares are still being accessed, and management wants service restored as quickly as possible. What should the incident response team do first?
Question 3
An employee reports a ransomware note on a finance laptop. The laptop is still powered on, connected to Wi-Fi, and the user says they were just working in a spreadsheet. Management wants the fastest safe response that also preserves evidence. What should the responder do first?
Question 4
You are handed a company laptop suspected in an insider theft case. Legal says the evidence may be needed in court. Which action best preserves admissibility?
Question 5
A developer wants to reduce the risk of SQL injection in a new customer search form. Which two changes are the best mitigations? Select two.
Question 6
A branch office uses a flat LAN, and a compromise on one user workstation could spread quickly to finance systems. Management wants finance workstations isolated from general users, but finance staff still need access to a central finance application and network printer. What is the best design change?
FAQ
Questions learners often ask
What does this SY0-701 question test?
Static NAT maps one inside address to one outside address.
What is the correct answer to this question?
The correct answer is: Encrypt the file with headquarters' public key — Encrypting the file with headquarters' public key is the best answer because it keeps the document confidential while still allowing the intended recipient to decrypt it with the matching private key. This is a common asymmetric encryption use case when no shared secret exists yet. It is especially useful for securely exchanging sensitive data across untrusted networks or between organizations. Why others are wrong: A hash only verifies that data has not changed; it does not hide the contents. A signature shows who sent the file and helps prove integrity, but the document is still readable. Compression may reduce bandwidth, but it is not a security control and offers no confidentiality against interception or unauthorized access.
What should I do if I get this SY0-701 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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