The answer is possible data exfiltration via HTTP. A sudden 300% increase in HTTP traffic from a single client IP to a single external web server is a classic indicator of data exfiltration, as attackers commonly abuse HTTP’s unrestricted outbound access to tunnel stolen data past firewalls and proxies. This pattern is distinct from a volumetric attack, which would typically involve many sources targeting one destination. On the Cisco CyberOps Associate 200-201 exam, this scenario tests your ability to distinguish between anomalous traffic patterns and baseline behavior, often appearing in questions about network security monitoring and threat detection. A common trap is confusing this with a DDoS attack, but remember that a single source to a single destination points to targeted data theft, not a distributed flood. Memory tip: “One IP, one server, huge spike—think exfil, not spike.”
200-201 Security Monitoring Practice Question
This 200-201 practice question tests your understanding of security monitoring. 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 baseline network traffic and notices that the normal HTTP traffic volume has increased by 300% over the past hour. The increase is from a single client IP to a single external web server. What does this indicate?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Possible data exfiltration via HTTP
A 300% increase in HTTP traffic from a single client IP to a single external web server is anomalous and strongly suggests data exfiltration. Attackers often use HTTP (port 80) to tunnel stolen data out of a network because it is typically allowed through firewalls and proxies without inspection. The fact that the traffic is from one IP to one server indicates a targeted, non-distributed activity, which aligns with exfiltration rather than a volumetric attack.
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.
✓
Possible data exfiltration via HTTP
Why this is correct
Large upload of data to a single external server is suspicious.
Related concept
Read the scenario before looking for a memorised answer.
✗
A denial-of-service (DoS) attack against the web server
Why it's wrong here
DoS would show many sources or massive traffic from many IPs.
✗
A distributed denial-of-service (DDoS) attack from botnets
Why it's wrong here
DDoS involves multiple sources, not one.
✗
Normal fluctuations during peak hours
Why it's wrong here
A 300% increase from one host is not normal fluctuation.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the distinction between a single-source anomaly (exfiltration or DoS) and a multi-source anomaly (DDoS), and the trap here is that candidates confuse a traffic volume increase with a DoS attack, ignoring the single-source indicator that points to exfiltration.
Trap categories for this question
Command / output trap
DoS would show many sources or massive traffic from many IPs.
Detailed technical explanation
How to think about this question
Data exfiltration over HTTP often uses techniques like HTTP POST requests with large payloads or chunked transfer encoding to bypass DLP controls. Tools like `curl` or custom scripts can send data in the request body, and because HTTP traffic is typically unencrypted (unless HTTPS is used), analysts can detect anomalies by inspecting packet sizes or request frequency. In a real-world scenario, an attacker might use a compromised internal host to upload sensitive files to a cloud storage endpoint via HTTP, which would appear as a sudden, sustained increase in outbound HTTP traffic from that single IP.
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 200-201 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
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Security Monitoring — This question tests Security Monitoring — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Possible data exfiltration via HTTP — A 300% increase in HTTP traffic from a single client IP to a single external web server is anomalous and strongly suggests data exfiltration. Attackers often use HTTP (port 80) to tunnel stolen data out of a network because it is typically allowed through firewalls and proxies without inspection. The fact that the traffic is from one IP to one server indicates a targeted, non-distributed activity, which aligns with exfiltration rather than a volumetric attack.
What should I do if I get this 200-201 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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