The correct choice is that an attacker is attempting to gain access by guessing usernames. This log entry shows a failed SSH authentication for an 'invalid user,' meaning the username 'admin' does not exist on the system, which is a hallmark of reconnaissance or brute-force attacks where an adversary systematically tests common usernames to map valid accounts. On the Systems Security Certified Practitioner SSCP exam, this scenario tests your ability to distinguish between authentication failures caused by mistyped passwords for real users versus systematic probing for valid accounts—a key skill in interpreting SSH failed login logs for reconnaissance. A common trap is assuming any failed login is a password error, but the critical clue is the 'invalid user' tag, which confirms the username itself is unknown. Memory tip: "Invalid user equals reconnaissance, valid user equals password guess."
SSCP Security Operations and Administration Practice Question
This SSCP practice question tests your understanding of security operations and administration. 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.
Exhibit
Refer to the exhibit.
May 12 14:32:18 server sshd[1234]: Failed password for invalid user admin from 192.168.1.10 port 22 ssh2
What does this log entry most likely indicate?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
An attacker is attempting to gain access by guessing usernames
The log shows a failed SSH authentication for an 'invalid user' (i.e., a username that does not exist on the system). This is typical of a brute-force or reconnaissance attack where the attacker tries common usernames. Option B correctly identifies this as an attacker attempting to guess usernames. Option A is incorrect because it is not a mistyped password for a valid user. Option C is incorrect as the log does not indicate misconfiguration. Option D is incorrect because the user 'admin' does not exist, not just disabled.
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 SSH service is misconfigured
Why it's wrong here
There is no indication of misconfiguration; failed logins for invalid users are common attack patterns.
✗
A user mistyped their password
Why it's wrong here
The log specifies 'invalid user', meaning the username does not exist, not a password error for a valid user.
✓
An attacker is attempting to gain access by guessing usernames
Why this is correct
The presence of an invalid username suggests reconnaissance or brute-force activity.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
The user account 'admin' has been disabled
Why it's wrong here
A disabled account would show 'disabled account' or similar, not 'invalid user'.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Trap categories for this question
Similar concept trap
A disabled account would show 'disabled account' or similar, not 'invalid user'.
Command / output trap
A disabled account would show 'disabled account' or similar, not 'invalid user'.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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 security analyst at a medium-sized enterprise encounters this scenario during an investigation or architecture review. The correct answer reflects best practice for the specific threat or control described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Security exam questions test whether you can match controls to threats in context — not just recall definitions.
What to study next
Got this wrong? Here's your next step.
Identify which SSCP exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Security Operations and Administration — This question tests Security Operations and Administration — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: An attacker is attempting to gain access by guessing usernames — The log shows a failed SSH authentication for an 'invalid user' (i.e., a username that does not exist on the system). This is typical of a brute-force or reconnaissance attack where the attacker tries common usernames. Option B correctly identifies this as an attacker attempting to guess usernames. Option A is incorrect because it is not a mistyped password for a valid user. Option C is incorrect as the log does not indicate misconfiguration. Option D is incorrect because the user 'admin' does not exist, not just disabled.
What should I do if I get this SSCP question wrong?
Identify which SSCP exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
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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