Question 1easymultiple choice
Full question →easymultiple choiceObjective-mapped
A user downloads a company software update and wants to verify it really came from the vendor and was not changed in transit. Which cryptographic feature should they check?
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
A digital signature from the vendor
A digital signature lets the user verify both the source and the integrity of the update. If the signature is valid, the file was signed by the expected private key holder and has not been altered since signing.
B
Distractor review
A longer filename with the vendor name in it
A filename can be changed easily and does not prove who created the file. It provides no cryptographic assurance.
C
Distractor review
A larger file size than the previous update
File size does not prove identity or integrity. Attackers can create files of any size, so this is not a security validation method.
D
Distractor review
A password protected ZIP file
Password protection may restrict access, but it does not prove the vendor created the file. It also does not verify that the contents were not modified.
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: A digital signature from the vendor — A digital signature is designed to prove integrity and authenticity. The vendor signs the update with its private key, and the user verifies it with the vendor’s public key or trusted certificate chain. If the signature checks out, the file has not been changed since signing and it likely came from the expected source. Why others are wrong: A filename, file size, or password-protected archive does not provide cryptographic proof of origin or integrity. Those properties can be faked or changed without detection. A digital signature is the correct tool because it ties the file to the signer and reveals tampering.
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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