Quick Answer
The correct answer is traceroute to map the network topology. This is because the pattern of incrementing TTL values in ICMP echo requests is the defining mechanism of a traceroute operation: each packet starts with a TTL of 1, then 2, then 3, and so on, so that each successive router along the path decrements the TTL to zero and replies with an ICMP Time Exceeded message, revealing the hop-by-hop route. On the Cisco CyberOps Associate 200-201 exam, this question tests your ability to recognize reconnaissance techniques in network traffic—traceroute detection often appears as a scenario where an analyst sees a single host sending ICMP echo requests with steadily rising TTLs to multiple destinations. A common trap is confusing this with a simple ping sweep, but the key differentiator is the incremental TTL, not just multiple pings. Memory tip: think of TTL as a “hop counter”—each increment forces the next router to reveal itself, like climbing a ladder one rung at a time.
This 200-201 practice question tests your understanding of security monitoring. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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.
An analyst is monitoring network traffic and notices a host sending ICMP echo requests to multiple hosts in the same subnet with a pattern of incrementing TTL values. What is the most likely purpose of this activity?
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.
DNS resolution attempt.
Why wrong: DNS uses UDP/TCP, not ICMP.
Ping sweep to identify active hosts.
Why wrong: Ping sweep uses constant TTL.
Denial of service attack against a specific host.
Why wrong: DoS has high packet rate, not TTL variation.
Traceroute to map the network topology.
Incrementing TTL is typical of traceroute.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Traceroute to map the network topology.
The pattern of incrementing TTL values in ICMP echo requests is the hallmark of a traceroute operation. Traceroute works by sending packets with TTL=1, then TTL=2, etc., so each successive router along the path decrements the TTL to 0 and sends back an ICMP Time Exceeded message, revealing the hop-by-hop path. The target host responds with an ICMP Echo Reply when the TTL is high enough to reach it, confirming the final hop.
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.
DNS resolution attempt.
Ping sweep to identify active hosts.
Why it's wrong here
Ping sweep uses constant TTL.
Denial of service attack against a specific host.
Why it's wrong here
DoS has high packet rate, not TTL variation.
Traceroute to map the network topology.
Why this is correct
Incrementing TTL is typical of traceroute.
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.
Common exam traps
Cisco often tests the distinction between a ping sweep (fixed TTL, multiple destinations) and a traceroute (incrementing TTL, single destination), so the trap here is confusing the pattern of incrementing TTLs with a simple liveness scan.
Detailed technical explanation
On Linux, traceroute uses UDP packets to high ports by default, while on Windows, tracert uses ICMP echo requests with incrementing TTLs—this question describes the Windows behavior. The TTL field is an 8-bit value in the IP header (RFC 791), decremented by each router; when it reaches 0, the router discards the packet and sends an ICMP Time Exceeded (type 11, code 0) message back to the source. In a real-world scenario, an analyst might see this during legitimate network troubleshooting or as a reconnaissance step by an attacker mapping internal infrastructure.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
What to study next
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FAQ
Security Monitoring — This question tests Security Monitoring — Read the scenario before looking for a memorised answer..
The correct answer is: Traceroute to map the network topology. — The pattern of incrementing TTL values in ICMP echo requests is the hallmark of a traceroute operation. Traceroute works by sending packets with TTL=1, then TTL=2, etc., so each successive router along the path decrements the TTL to 0 and sends back an ICMP Time Exceeded message, revealing the hop-by-hop path. The target host responds with an ICMP Echo Reply when the TTL is high enough to reach it, confirming the final hop.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 25, 2026
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