Question 2,058 of 2,152

NetFlow and Flexible NetFlow →hardMultiple ChoiceObjective-mapped

300-410 NetFlow and Flexible NetFlow Practice Question

This 300-410 practice question tests your understanding of netflow and flexible netflow. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 engineer configures Control Plane Policing (CoPP) on a router to protect the management plane. After applying the policy, the router becomes unreachable via SSH, but the console is still accessible. The engineer checks the CoPP policy and sees that SSH traffic is permitted. Which is the most likely explanation?

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.

Question 1hardmultiple choice

Study the full ACL explanation →

A
The class-map for SSH uses 'match protocol ssh' but the SSH server is configured on a non-default port, so the traffic is not matched and is dropped by the default class.
CoPP class-maps that match by protocol may not match non-standard ports. If the default class has a drop action, SSH traffic will be dropped.
B
The CoPP policy is applied in the input direction, but SSH traffic is generated by the router itself, so it is not affected by input policing.
Why wrong: CoPP applies to traffic destined to the router, including SSH. Input policing affects incoming packets, so it should match SSH traffic.
C
The CoPP policy uses 'rate-limit' in bps instead of pps, causing all traffic to be dropped due to a misconfiguration.
Why wrong: Rate-limit units (bps vs pps) affect the policing rate but do not cause all traffic to be dropped unless the rate is set to 0.
D
The CoPP policy has an explicit deny statement before the permit statement for SSH, so SSH traffic is denied.
Why wrong: This is a possible misconfiguration, but the scenario states that SSH traffic is permitted, so this is not the case.

Full breakdown with real-world context →

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

✓

The class-map for SSH uses 'match protocol ssh' but the SSH server is configured on a non-default port, so the traffic is not matched and is dropped by the default class.

CoPP policies have an implicit deny at the end. If the class-map for SSH does not match the traffic correctly (e.g., using the wrong protocol or port), SSH packets will fall through to the default class, which may have a deny action. Additionally, the default class behavior is to permit traffic if not explicitly configured, but if the default class is configured with a drop action, all unmatched traffic is dropped. A common edge case is when the class-map uses 'match protocol ssh' but the router uses a different port for SSH (e.g., port 2222), so the traffic is not matched and is dropped by the default class.

Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

✓
The class-map for SSH uses 'match protocol ssh' but the SSH server is configured on a non-default port, so the traffic is not matched and is dropped by the default class.
Why this is correct
CoPP class-maps that match by protocol may not match non-standard ports. If the default class has a drop action, SSH traffic will be dropped.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
✗
The CoPP policy is applied in the input direction, but SSH traffic is generated by the router itself, so it is not affected by input policing.
Why it's wrong here
CoPP applies to traffic destined to the router, including SSH. Input policing affects incoming packets, so it should match SSH traffic.
✗
The CoPP policy uses 'rate-limit' in bps instead of pps, causing all traffic to be dropped due to a misconfiguration.
Why it's wrong here
Rate-limit units (bps vs pps) affect the policing rate but do not cause all traffic to be dropped unless the rate is set to 0.
✗
The CoPP policy has an explicit deny statement before the permit statement for SSH, so SSH traffic is denied.
Why it's wrong here
This is a possible misconfiguration, but the scenario states that SSH traffic is permitted, so this is not the case.

Common exam traps

Common exam trap: NAT rules depend on direction and matching traffic

NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.

Trap categories for this question

Scenario analysis trap
This is a possible misconfiguration, but the scenario states that SSH traffic is permitted, so this is not the case.

Detailed technical explanation

How to think about this question

NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.

KKey Concepts to Remember

Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.

TExam Day Tips

Identify inside and outside interfaces first.
Check whether the scenario needs static NAT, dynamic NAT or PAT.
Do not confuse NAT matching ACLs with normal packet-filtering intent.

Key takeaway

NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.

Real-world example

How this comes up in practice

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

Got this wrong? Here's your next step.

Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related 300-410 NAT questions on configuration and troubleshooting.

Related 300-410 practice-question pages

Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.

Layer 3 Technologies practice questions

Practise 300-410 questions linked to Layer 3 Technologies.

EIGRP Troubleshooting practice questions

Practise 300-410 questions linked to EIGRP Troubleshooting.

OSPF Troubleshooting (v2/v3) practice questions

Practise 300-410 questions linked to OSPF Troubleshooting (v2/v3).

BGP Troubleshooting practice questions

Practise 300-410 questions linked to BGP Troubleshooting.

Route Redistribution practice questions

Practise 300-410 questions linked to Route Redistribution.

Policy-Based Routing (PBR) practice questions

Practise 300-410 questions linked to Policy-Based Routing (PBR).

VRF-Lite practice questions

Practise 300-410 questions linked to VRF-Lite.

Route Maps and Route Filtering practice questions

Practise 300-410 questions linked to Route Maps and Route Filtering.

Administrative Distance practice questions

Practise 300-410 questions linked to Administrative Distance.

Route Summarization practice questions

Practise 300-410 questions linked to Route Summarization.

Bidirectional Forwarding Detection (BFD) practice questions

Practise 300-410 questions linked to Bidirectional Forwarding Detection (BFD).

VPN Technologies practice questions

Practise 300-410 questions linked to VPN Technologies.

Practice this exam

Start a free 300-410 practice session

Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.

10 questions 20 questions 30 questions 50 questions Timed 30

300-410 practice-test guide →Study guide →Browse all practice tests

FAQ

Questions learners often ask

What does this 300-410 question test?

NetFlow and Flexible NetFlow — This question tests NetFlow and Flexible NetFlow — Static NAT maps one inside address to one outside address..

What is the correct answer to this question?

The correct answer is: The class-map for SSH uses 'match protocol ssh' but the SSH server is configured on a non-default port, so the traffic is not matched and is dropped by the default class. — CoPP policies have an implicit deny at the end. If the class-map for SSH does not match the traffic correctly (e.g., using the wrong protocol or port), SSH packets will fall through to the default class, which may have a deny action. Additionally, the default class behavior is to permit traffic if not explicitly configured, but if the default class is configured with a drop action, all unmatched traffic is dropped. A common edge case is when the class-map uses 'match protocol ssh' but the router uses a different port for SSH (e.g., port 2222), so the traffic is not matched and is dropped by the default class.

What should I do if I get this 300-410 question wrong?

Are there clue words in this question I should notice?

Yes — watch for: "most likely". 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?

Static NAT maps one inside address to one outside address.

About these practice questions

Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →

How Courseiva writes practice questions · Editorial policy

Keep practising

Question Discussion

Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.

Loading comments…

This 300-410 practice question is part of Courseiva's free Cisco 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 300-410 exam.