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Nokia 4A0-D01 Exam - Topic 1 Question 21 Discussion

Which of the following statements about a CPM-filter policer is FALSE?
B) The system-cpu-policer is hardware-based.
A) Hierarchical policing of control plane traffic is supported.
C) The system-cpu-policer acts on the aggregate traffic from all line cards.
D) CPM-filter entries can use both a distributed-policer and a system-cpu-policer.

Nokia 4A0-D01 Exam - Topic 1 Question 21 Discussion

Actual exam question for Nokia's 4A0-D01 exam
Question #: 21
Topic #: 1
[All 4A0-D01 Questions]

Which of the following statements about a CPM-filter policer is FALSE?

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Suggested Answer: B

The system-cpu-policer in Nokia SR Linux is software-based, not hardware-based. It acts on aggregate control plane traffic and supports hierarchical policing with CPM-filter entries using both distributed and system-cpu-policers.


by Gerry at Jun 16, 2026, 04:17 AM

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Mel
13 days ago
I’m leaning towards D being false. Mixing policers is tricky.
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Alona
18 days ago
I agree, B seems off. Software usually handles that.
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Carolynn
23 days ago
I think option B is false. Hardware-based sounds too strong.
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Alyssa
28 days ago
Wait, really? I didn’t know about the distributed-policer!
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Karan
1 month ago
D) sounds off, can’t use both types together.
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Effie
1 month ago
C) is definitely true, it aggregates all line cards.
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Erasmo
1 month ago
I thought B) was hardware-based too, seems right.
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Yolando
2 months ago
A) is true, hierarchical policing is supported.
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Arlean
2 months ago
I vaguely remember that the system-cpu-policer does aggregate traffic, but I’m not confident about how it interacts with line cards.
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Jamey
2 months ago
I feel like D could be the false statement, but I can't recall if both types of policers can actually be used together.
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Leah
2 months ago
I think I came across a similar question in practice that mentioned hierarchical policing, so I’m leaning towards A being true.
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Francene
2 months ago
I remember studying about CPM-filter policers, but I'm not entirely sure if the system-cpu-policer is hardware-based or not.
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