This N10-009 practice question tests your understanding of network operations. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Which SNMPv3 security level provides both authentication and encryption?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
authPriv
Option C (authPriv) is correct because SNMPv3 defines three security levels: noAuthNoPriv, authNoPriv, and authPriv. The authPriv level provides both authentication (using HMAC-MD5 or HMAC-SHA) and encryption (using CBC-DES or AES) to ensure data integrity, origin verification, and confidentiality. This is the highest security level defined in RFC 3414.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
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noAuthNoPriv
Why it's wrong here
This level provides no security; messages are sent in cleartext with no authentication or encryption.
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authNoPriv
Why it's wrong here
This level provides authentication but no encryption. Data integrity is verified, but the data is not encrypted.
✓
authPriv
Why this is correct
This level provides both authentication (using MD5 or SHA) and encryption (using DES or AES), ensuring data integrity and privacy.
Related concept
Read the scenario before looking for a memorised answer.
✗
noAuthPriv
Why it's wrong here
This is not a valid SNMP security level. The levels are strictly noAuthNoPriv, authNoPriv, and authPriv.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse the valid SNMPv3 security levels with the invalid 'noAuthPriv' option, which sounds plausible but is not defined in the standard—CompTIA often tests this by listing it as a distractor to catch those who haven't memorized the exact three levels.
Detailed technical explanation
How to think about this question
Under the hood, SNMPv3 uses a User-based Security Model (USM) where each user has a securityName, authentication protocol (e.g., HMAC-SHA-96), and privacy protocol (e.g., CFB128-AES-128). When authPriv is configured, the engineID and timeliness parameters are used to derive keys, and the message is encrypted after authentication is applied. In real-world deployments, authPriv is mandatory for managing critical infrastructure like routers and firewalls to prevent replay attacks and credential sniffing.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the N10-009 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this N10-009 question in full detail.
Network Operations — This question tests Network Operations — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: authPriv — Option C (authPriv) is correct because SNMPv3 defines three security levels: noAuthNoPriv, authNoPriv, and authPriv. The authPriv level provides both authentication (using HMAC-MD5 or HMAC-SHA) and encryption (using CBC-DES or AES) to ensure data integrity, origin verification, and confidentiality. This is the highest security level defined in RFC 3414.
What should I do if I get this N10-009 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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