Quick Answer
The correct conclusion is that multicast traffic is flowing for group 239.4.4.4, as the output shows 1500 packets and 1200000 bytes with an average rate of 8000 pps, while group 239.5.5.5 shows zero packets and bytes. This interpretation hinges on understanding that the "show ip mroute count" command displays per-group and per-source multicast forwarding statistics, where non-zero packet and byte counts confirm active traffic flow through the router’s multicast routing table. On the ENCOR 350-401 exam, this command tests your ability to verify multicast forwarding and troubleshoot traffic issues, often appearing in questions that ask you to distinguish between active and inactive groups. A common trap is assuming that a group entry in the output guarantees traffic—remember, an entry only exists if the router has joined the group via PIM, but the count reveals whether data is actually being forwarded. Memory tip: "Count the packets, not the groups" — zero packets means zero flow, regardless of the group listing.
This 350-401 practice question tests your understanding of ip multicast. Examine the command output carefully: the correct answer depends on what the output actually shows, not on general recall alone. 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 network engineer runs the following command on Router R8:
R8# show ip mroute count IP Multicast Statistics
Group: 239.4.4.4, Source: 10.0.0.9 Packets: 1500, Bytes: 1200000, Average rate: 8000 pps, 5 sec rate: 0 pps
Group: 239.5.5.5, Source: 10.0.0.10 Packets: 0, Bytes: 0, Average rate: 0 pps, 5 sec rate: 0 pps
Based on this output, what can be concluded?
Multicast traffic is flowing for group 239.4.4.4.
The packet and byte counts are non-zero, indicating traffic.
Multicast traffic is flowing for group 239.5.5.5.
Why wrong: The counts are zero, indicating no traffic.
Both groups are receiving traffic.
Why wrong: Only one group has non-zero counts.
The source for group 239.4.4.4 is 10.0.0.10.
Why wrong: The source is 10.0.0.9, not 10.0.0.10.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Multicast traffic is flowing for group 239.4.4.4.
The 'show ip mroute count' output shows multicast statistics for two groups. For group 239.4.4.4, there are 1500 packets and 1200000 bytes, with an average rate of 8000 pps. For group 239.5.5.5, there are no packets. This indicates that multicast traffic is flowing for the first group but not for the second. The correct answer is that multicast traffic is being received for group 239.4.4.4.
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.
Multicast traffic is flowing for group 239.4.4.4.
Why this is correct
The packet and byte counts are non-zero, indicating traffic.
Related concept
Read the scenario before looking for a memorised answer.
Multicast traffic is flowing for group 239.5.5.5.
Why it's wrong here
The counts are zero, indicating no traffic.
Both groups are receiving traffic.
Why it's wrong here
Only one group has non-zero counts.
The source for group 239.4.4.4 is 10.0.0.10.
Why it's wrong here
The source is 10.0.0.9, not 10.0.0.10.
Common exam traps
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.
Detailed technical explanation
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.
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 350-401 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 350-401 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.
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FAQ
IP Multicast — This question tests IP Multicast — Read the scenario before looking for a memorised answer..
The correct answer is: Multicast traffic is flowing for group 239.4.4.4. — The 'show ip mroute count' output shows multicast statistics for two groups. For group 239.4.4.4, there are 1500 packets and 1200000 bytes, with an average rate of 8000 pps. For group 239.5.5.5, there are no packets. This indicates that multicast traffic is flowing for the first group but not for the second. The correct answer is that multicast traffic is being received for group 239.4.4.4.
Identify which 350-401 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.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 18, 2026
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