This CEH practice question tests your understanding of enumeration and system hacking. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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.
A security engineer runs SNMPwalk on a network device and receives community strings as 'public' and 'private'. What is the PRIMARY concern?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "primary"
Why it matters: Asks for the main purpose or function, not a secondary benefit. Eliminate answers that describe side-effects or partial functions.
The device is vulnerable to buffer overflow attacks
Why wrong: SNMPwalk does not indicate buffer overflow.
The device is infected with malware
Why wrong: No indication of malware.
The device may be exposing sensitive configuration information
Default community strings enable information leakage.
The device is using outdated encryption protocols
Why wrong: SNMPv1/v2c uses community strings, not encryption.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
The device may be exposing sensitive configuration information
The SNMP community strings 'public' and 'private' are default read-only and read-write credentials defined in SNMPv1 and SNMPv2c. An attacker who can SNMPwalk the device with these strings can enumerate the entire MIB tree, including system configuration, routing tables, interface details, and user accounts. This directly exposes sensitive configuration information, making C the primary concern.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
The device is vulnerable to buffer overflow attacks
Why it's wrong here
SNMPwalk does not indicate buffer overflow.
The device is infected with malware
Why it's wrong here
No indication of malware.
The device may be exposing sensitive configuration information
Why this is correct
Default community strings enable information leakage.
Clue confirmation
The clue word "primary" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
The device is using outdated encryption protocols
Why it's wrong here
SNMPv1/v2c uses community strings, not encryption.
Common exam traps
EC-Council often tests the distinction between 'default credentials' and 'exploitation vectors'—candidates mistakenly associate 'public/private' with encryption or malware, when the real risk is unauthorized information disclosure via SNMP enumeration.
Detailed technical explanation
SNMPwalk uses the GETNEXT operation to sequentially retrieve all OIDs from the MIB, effectively dumping the entire device configuration. In SNMPv1/v2c, community strings act as plaintext passwords—'public' typically grants read access, while 'private' grants write access, allowing an attacker to not only read but also modify device settings. Real-world attacks often chain SNMP enumeration with default credentials to discover SNMPv3 credentials or other sensitive data like VPN pre-shared keys.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A practitioner preparing for the CEH 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
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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FAQ
Enumeration and System Hacking — This question tests Enumeration and System Hacking — Read the scenario before looking for a memorised answer..
The correct answer is: The device may be exposing sensitive configuration information — The SNMP community strings 'public' and 'private' are default read-only and read-write credentials defined in SNMPv1 and SNMPv2c. An attacker who can SNMPwalk the device with these strings can enumerate the entire MIB tree, including system configuration, routing tables, interface details, and user accounts. This directly exposes sensitive configuration information, making C the primary concern.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Yes — watch for: "primary". Asks for the main purpose or function, not a secondary benefit. Eliminate answers that describe side-effects or partial functions.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 30, 2026
This CEH practice question is part of Courseiva's free EC-Council certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the CEH exam.
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