- A
The username and password are sent in clear text.
Why wrong: In 'noAuthNoPriv', no authentication password is used; only the username is sent. There is no password involved.
- B
The SNMP engine ID is still used for message processing and identification.
The engine ID is always used in SNMPv3 for message processing, regardless of the security level.
- C
The 'snmp-server user' command must include the 'auth' and 'priv' keywords set to 'md5' and 'des' respectively.
Why wrong: For 'noAuthNoPriv', the 'auth' and 'priv' keywords are omitted. Including them would require authentication or encryption.
- D
The security level is configured per user, not per group.
Why wrong: The security level is configured per group via the 'snmp-server group' command; the user inherits the security level from the group.
- E
The engine ID can be manually configured or automatically generated based on the router's MAC address.
The engine ID is either generated automatically (using the router's MAC address) or manually set with the 'snmp-server engine-id' command.
Understanding SNMPv3 noAuthNoPriv Characteristics
This 300-410 practice question tests your understanding of snmp troubleshooting. 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 TWO statements correctly describe the behavior of SNMPv3 when using the 'noAuthNoPriv' security level? (Choose TWO.)
Quick Answer
The answer is that SNMPv3's noAuthNoPriv security level uses a username instead of a community string, and the engine ID is either manually configured or automatically generated from the router's MAC address. This is correct because noAuthNoPriv provides neither authentication nor encryption, meaning the 'auth' and 'priv' keywords are omitted from the 'snmp-server user' command, yet the engine ID remains essential for message processing and is tied to the device's identity. On the Cisco CCNP ENARSI 300-410 exam, this concept tests your understanding that security levels are configured per user, not per group, and a common trap is confusing noAuthNoPriv with SNMPv2c—remember, the community string is replaced entirely by the username. A useful memory tip: "No Auth, No Priv, but the Engine ID still lives."
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
The SNMP engine ID is still used for message processing and identification.
Option B is correct because SNMPv3 always uses the engine ID for message processing and identification, regardless of the security level. Even with 'noAuthNoPriv', the engine ID is included in the SNMP message to uniquely identify the SNMP engine, enabling proper message handling and context for the security model.
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.
- ✗
The username and password are sent in clear text.
Why it's wrong here
In 'noAuthNoPriv', no authentication password is used; only the username is sent. There is no password involved.
- ✓
The SNMP engine ID is still used for message processing and identification.
Why this is correct
The engine ID is always used in SNMPv3 for message processing, regardless of the security level.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
The 'snmp-server user' command must include the 'auth' and 'priv' keywords set to 'md5' and 'des' respectively.
Why it's wrong here
For 'noAuthNoPriv', the 'auth' and 'priv' keywords are omitted. Including them would require authentication or encryption.
- ✗
The security level is configured per user, not per group.
Why it's wrong here
The security level is configured per group via the 'snmp-server group' command; the user inherits the security level from the group.
- ✓
The engine ID can be manually configured or automatically generated based on the router's MAC address.
Why this is correct
The engine ID is either generated automatically (using the router's MAC address) or manually set with the 'snmp-server engine-id' command.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the misconception that 'noAuthNoPriv' sends a password in clear text, when in fact no authentication is performed at all, so no password is transmitted.
Trap categories for this question
Keyword trap
For 'noAuthNoPriv', the 'auth' and 'priv' keywords are omitted. Including them would require authentication or encryption.
Command / output trap
The security level is configured per group via the 'snmp-server group' command; the user inherits the security level from the group.
Detailed technical explanation
How to think about this question
The SNMPv3 engine ID is a unique identifier (up to 64 octets) that can be automatically derived from the router's MAC address or manually configured. It is used in message processing to correlate users, keys, and contexts; even with 'noAuthNoPriv', the engine ID ensures that the message is associated with the correct SNMP engine, which is critical in multi-engine environments or when using proxies.
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 300-410 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.
What to study next
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FAQ
Questions learners often ask
What does this 300-410 question test?
SNMP Troubleshooting — This question tests SNMP Troubleshooting — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The SNMP engine ID is still used for message processing and identification. — Option B is correct because SNMPv3 always uses the engine ID for message processing and identification, regardless of the security level. Even with 'noAuthNoPriv', the engine ID is included in the SNMP message to uniquely identify the SNMP engine, enabling proper message handling and context for the security model.
What should I do if I get this 300-410 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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Last reviewed: Jul 4, 2026
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