- A
Brute-force attack
Correct. A brute-force attack is characterized by systematically trying many different passwords against a single account until the correct one is found. The log pattern of multiple failed attempts followed by a success aligns with this method.
- B
Credential stuffing
Why wrong: Incorrect. Credential stuffing uses previously leaked username and password pairs from other breaches. It typically shows many failed attempts but often with the same password tried across different accounts, not many different passwords against one account.
- C
Password spraying
Why wrong: Incorrect. Password spraying involves using a small number of common passwords against many different accounts to avoid lockout thresholds. The scenario describes many attempts against a single account, which is the opposite of password spraying.
- D
Dictionary attack
Why wrong: Incorrect. A dictionary attack uses a list of common words or phrases as password guesses. While it is a type of brute-force, the term 'dictionary attack' implies a specific subset of guesses. The scenario suggests a more exhaustive, non-dictionary-based iteration (e.g., alphanumeric combinations) typical of a general brute-force attack.
SY0-701 Security Operations Practice Question
This SY0-701 practice question tests your understanding of security 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.
A security analyst is reviewing authentication logs and observes multiple failed login attempts for a single user account occurring within a short timeframe, followed by a successful login from an IP address located in a country where the user has never traveled. The failed attempts originate from various IP addresses and use different passwords. Which type of attack has most likely occurred?
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.
Clue:
"never"Why it matters: Absolute qualifier. True only if the statement has zero exceptions — be cautious of options that seem obvious but break down in edge cases.
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
Brute-force attack
The correct answer is A (Brute-force attack) because the log shows multiple failed login attempts from various IP addresses using different passwords, followed by a successful login from an unfamiliar country. This pattern indicates a distributed brute-force attack where the attacker systematically tries many passwords against a single account, often using a botnet or proxy rotation to evade IP-based rate limiting. The successful login from a foreign IP confirms the attacker eventually guessed the correct password.
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.
- ✓
Brute-force attack
Why this is correct
Correct. A brute-force attack is characterized by systematically trying many different passwords against a single account until the correct one is found. The log pattern of multiple failed attempts followed by a success aligns with this method.
Clue confirmation
The clue words "most likely", "never" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Credential stuffing
Why it's wrong here
Incorrect. Credential stuffing uses previously leaked username and password pairs from other breaches. It typically shows many failed attempts but often with the same password tried across different accounts, not many different passwords against one account.
- ✗
Password spraying
Why it's wrong here
Incorrect. Password spraying involves using a small number of common passwords against many different accounts to avoid lockout thresholds. The scenario describes many attempts against a single account, which is the opposite of password spraying.
- ✗
Dictionary attack
Why it's wrong here
Incorrect. A dictionary attack uses a list of common words or phrases as password guesses. While it is a type of brute-force, the term 'dictionary attack' implies a specific subset of guesses. The scenario suggests a more exhaustive, non-dictionary-based iteration (e.g., alphanumeric combinations) typical of a general brute-force attack.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse 'multiple failed attempts from various IPs' with credential stuffing, but the key differentiator is that credential stuffing uses known credential pairs, not systematically generated passwords against a single account.
Trap categories for this question
Keyword trap
Incorrect. A dictionary attack uses a list of common words or phrases as password guesses. While it is a type of brute-force, the term 'dictionary attack' implies a specific subset of guesses. The scenario suggests a more exhaustive, non-dictionary-based iteration (e.g., alphanumeric combinations) typical of a general brute-force attack.
Command / output trap
Incorrect. Credential stuffing uses previously leaked username and password pairs from other breaches. It typically shows many failed attempts but often with the same password tried across different accounts, not many different passwords against one account.
Scenario analysis trap
Incorrect. Password spraying involves using a small number of common passwords against many different accounts to avoid lockout thresholds. The scenario describes many attempts against a single account, which is the opposite of password spraying.
Detailed technical explanation
How to think about this question
In a distributed brute-force attack, attackers often leverage tools like Hydra or Medusa with proxy rotation (e.g., SOCKS5 proxies) to bypass account lockout thresholds and IP-based rate limiting. The failed attempts may appear as a low-and-slow pattern across many source IPs, making detection difficult without correlation across time and geography. Real-world scenarios include attacks on VPN portals or OWA (Outlook Web Access) where single-factor authentication is used, and the attacker may use a wordlist combined with common password mutations (e.g., adding numbers or symbols).
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 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.
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FAQ
Questions learners often ask
What does this SY0-701 question test?
Security Operations — This question tests Security Operations — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Brute-force attack — The correct answer is A (Brute-force attack) because the log shows multiple failed login attempts from various IP addresses using different passwords, followed by a successful login from an unfamiliar country. This pattern indicates a distributed brute-force attack where the attacker systematically tries many passwords against a single account, often using a botnet or proxy rotation to evade IP-based rate limiting. The successful login from a foreign IP confirms the attacker eventually guessed the correct password.
What should I do if I get this SY0-701 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "most likely", "never". 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.
About these practice questions
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Last reviewed: Jun 11, 2026
This SY0-701 practice question is part of Courseiva's free CompTIA 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 SY0-701 exam.
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