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Exam Code: 300-420

Exam Name Designing Cisco Enterprise Networks (ENSLD)

Certification Provider: Cisco

Corresponding Certification: CCNP Enterprise

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Designing Cisco Enterprise Networks (ENSLD) (300-420) Practice Tests

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Cisco 300-420 Practice Test 74

Question 730

The design record describes this issue: During a predeployment review for a financial trading campus, the team discovers this design gap: remote management traffic is regularly delayed by a large software-image transfer over a narrow WAN circuit. An approval gate requires both a measurable acceptance check and a durable prevention control. Which technical principle BEST explains the design decision?

  1. OOB management can remain accessible when an in-band production network or routing plane fails.
  2. Management-plane segmentation reduces the attack surface and common-mode dependency on user traffic.
  3. Weighted random early detection can drop selected packets before total queue exhaustion to help reduce synchronized TCP congestion.
  4. Critical management flows can be protected from starvation by a coherent end-to-end QoS policy.

Explanation

Correct Answer

D:

Critical management flows can be protected from starvation by a coherent end-to-end QoS policy. The correct engineering response is: Classify and provide bounded bandwidth priority for required management-plane protocols. The observable check is: SSH, telemetry and route-monitoring traffic remain usable during sustained bulk transfers. The financial trading campus acceptance record also captures this result.

Incorrect Answers

A:

Critical management flows can be protected from starvation by a coherent end-to-end QoS policy. The offered choice instead concerns a different principle: OOB management can remain accessible when an in-band production network or routing plane fails. Those technical conditions are not interchangeable.

B:

Critical management flows can be protected from starvation by a coherent end-to-end QoS policy. The offered choice instead concerns a different principle: Management-plane segmentation reduces the attack surface and common-mode dependency on user traffic. Those technical conditions are not interchangeable.

C:

Critical management flows can be protected from starvation by a coherent end-to-end QoS policy. The offered choice instead concerns a different principle: Weighted random early detection can drop selected packets before total queue exhaustion to help reduce synchronized TCP congestion. Those technical conditions are not interchangeable.

Question 731

After designing a change for the following scenario: During a predeployment review for a financial trading campus, the team discovers this design gap: remote management traffic is regularly delayed by a large software-image transfer over a narrow WAN circuit. An approval gate requires both a measurable acceptance check and a durable prevention control. Which acceptance observation BEST establishes the intended result?

  1. SSH, telemetry and route-monitoring traffic remain usable during sustained bulk transfers. The financial trading campus acceptance record also captures this result.
  2. During loss of the primary services site, required DNS, monitoring and administration remain available.
  3. Only authorized sites and administrators can establish collector sessions and logs show approved sources.
  4. During an induced production outage, an authorized operator reaches device console or management endpoints through OOB.

Explanation

Correct Answer

A:

SSH, telemetry and route-monitoring traffic remain usable during sustained bulk transfers. The financial trading campus acceptance record also captures this result. Critical management flows can be protected from starvation by a coherent end-to-end QoS policy.

Incorrect Answers

B:

Shared management and infrastructure services become dependencies that can undermine an otherwise redundant routed network. In the case being tested, Critical management flows can be protected from starvation by a coherent end-to-end QoS policy. The necessary acceptance evidence is: SSH, telemetry and route-monitoring traffic remain usable during sustained bulk transfers. The financial trading campus acceptance record also captures this result.

C:

Telemetry collectors can carry sensitive operational data and should be protected by management and access boundaries. In the case being tested, Critical management flows can be protected from starvation by a coherent end-to-end QoS policy. The necessary acceptance evidence is: SSH, telemetry and route-monitoring traffic remain usable during sustained bulk transfers. The financial trading campus acceptance record also captures this result.

D:

OOB management can remain accessible when an in-band production network or routing plane fails. In the case being tested, Critical management flows can be protected from starvation by a coherent end-to-end QoS policy. The necessary acceptance evidence is: SSH, telemetry and route-monitoring traffic remain usable during sustained bulk transfers. The financial trading campus acceptance record also captures this result.

Question 732

A preventive architecture review covers this situation: During a predeployment review for a financial trading campus, the team discovers this design gap: remote management traffic is regularly delayed by a large software-image transfer over a narrow WAN circuit. An approval gate requires both a measurable acceptance check and a durable prevention control. Which preventive design control MOST DIRECTLY addresses this specific risk?

  1. Test OOB power and link diversity rather than assuming independence from the primary WAN.
  2. List critical management applications and size reserved bandwidth under worst-case load. Apply the same control to the financial trading campus rollout checklist.
  3. Review management ACLs, AAA and break-glass access in each security audit.
  4. Maintain collector certificates, ACL inventories and retention rules in the management standard.

Explanation

Correct Answer

B:

List critical management applications and size reserved bandwidth under worst-case load. Apply the same control to the financial trading campus rollout checklist. This control targets the underlying design risk. Critical management flows can be protected from starvation by a coherent end-to-end QoS policy. The follow-up acceptance check remains: SSH, telemetry and route-monitoring traffic remain usable during sustained bulk transfers. The financial trading campus acceptance record also captures this result.

Incorrect Answers

A:

OOB management can remain accessible when an in-band production network or routing plane fails. The repeat risk here is different: Critical management flows can be protected from starvation by a coherent end-to-end QoS policy. A directly relevant preventive control is: List critical management applications and size reserved bandwidth under worst-case load. Apply the same control to the financial trading campus rollout checklist.

C:

Management-plane segmentation reduces the attack surface and common-mode dependency on user traffic. The repeat risk here is different: Critical management flows can be protected from starvation by a coherent end-to-end QoS policy. A directly relevant preventive control is: List critical management applications and size reserved bandwidth under worst-case load. Apply the same control to the financial trading campus rollout checklist.

D:

Telemetry collectors can carry sensitive operational data and should be protected by management and access boundaries. The repeat risk here is different: Critical management flows can be protected from starvation by a coherent end-to-end QoS policy. A directly relevant preventive control is: List critical management applications and size reserved bandwidth under worst-case load. Apply the same control to the financial trading campus rollout checklist.

Question 733

A new campus or WAN review presents this constraint: Network operations want to collect telemetry from every site but will expose the collector publicly to simplify deployment. Which action MOST DIRECTLY meets the stated design requirement?

  1. Separate management reachability into an appropriate management VRF or dedicated management network with restricted access.
  2. Classify and provide bounded bandwidth priority for required management-plane protocols.
  3. Evaluate IntServ/RSVP-style resource reservation only where every participating device can support it.
  4. Use authenticated encrypted collection paths and a segmented management architecture instead of unrestricted Internet exposure.

Explanation

Correct Answer

D:

Use authenticated encrypted collection paths and a segmented management architecture instead of unrestricted Internet exposure. This action addresses the stated design problem. Telemetry collectors can carry sensitive operational data and should be protected by management and access boundaries. A practical confirmation is: Only authorized sites and administrators can establish collector sessions and logs show approved sources.

Incorrect Answers

A:

Management-plane segmentation reduces the attack surface and common-mode dependency on user traffic. The actual fault is governed by a different mechanism: Telemetry collectors can carry sensitive operational data and should be protected by management and access boundaries. The needed response is: Use authenticated encrypted collection paths and a segmented management architecture instead of unrestricted Internet exposure.

B:

Critical management flows can be protected from starvation by a coherent end-to-end QoS policy. The actual fault is governed by a different mechanism: Telemetry collectors can carry sensitive operational data and should be protected by management and access boundaries. The needed response is: Use authenticated encrypted collection paths and a segmented management architecture instead of unrestricted Internet exposure.

C:

Integrated Services can request per-flow resource treatment but introduces signaling and state scalability trade-offs. The actual fault is governed by a different mechanism: Telemetry collectors can carry sensitive operational data and should be protected by management and access boundaries. The needed response is: Use authenticated encrypted collection paths and a segmented management architecture instead of unrestricted Internet exposure.

Question 734

For this Cisco ENSLD design case: Network operations want to collect telemetry from every site but will expose the collector publicly to simplify deployment. Which technical principle BEST explains the design decision?

  1. Telemetry collectors can carry sensitive operational data and should be protected by management and access boundaries.
  2. Critical management flows can be protected from starvation by a coherent end-to-end QoS policy.
  3. Management-plane segmentation reduces the attack surface and common-mode dependency on user traffic.
  4. MSDP can advertise active sources between participating RPs in ASM deployments; it is not an SSM dependency.

Explanation

Correct Answer

A:

Telemetry collectors can carry sensitive operational data and should be protected by management and access boundaries. The correct engineering response is: Use authenticated encrypted collection paths and a segmented management architecture instead of unrestricted Internet exposure. The observable check is: Only authorized sites and administrators can establish collector sessions and logs show approved sources.

Incorrect Answers

B:

Telemetry collectors can carry sensitive operational data and should be protected by management and access boundaries. The offered choice instead concerns a different principle: Critical management flows can be protected from starvation by a coherent end-to-end QoS policy. Those technical conditions are not interchangeable.

C:

Telemetry collectors can carry sensitive operational data and should be protected by management and access boundaries. The offered choice instead concerns a different principle: Management-plane segmentation reduces the attack surface and common-mode dependency on user traffic. Those technical conditions are not interchangeable.

D:

Telemetry collectors can carry sensitive operational data and should be protected by management and access boundaries. The offered choice instead concerns a different principle: MSDP can advertise active sources between participating RPs in ASM deployments; it is not an SSM dependency. Those technical conditions are not interchangeable.

Question 735

During acceptance testing for this network design: Network operations want to collect telemetry from every site but will expose the collector publicly to simplify deployment. Which acceptance observation BEST establishes the intended result?

  1. During loss of the primary services site, required DNS, monitoring and administration remain available.
  2. Only authorized sites and administrators can establish collector sessions and logs show approved sources.
  3. During an induced production outage, an authorized operator reaches device console or management endpoints through OOB.
  4. Only approved jump hosts can reach management interfaces and user VLANs cannot enter the management segment.

Explanation

Correct Answer

B:

Only authorized sites and administrators can establish collector sessions and logs show approved sources. Telemetry collectors can carry sensitive operational data and should be protected by management and access boundaries.

Incorrect Answers

A:

Shared management and infrastructure services become dependencies that can undermine an otherwise redundant routed network. In the case being tested, Telemetry collectors can carry sensitive operational data and should be protected by management and access boundaries. The necessary acceptance evidence is: Only authorized sites and administrators can establish collector sessions and logs show approved sources.

C:

OOB management can remain accessible when an in-band production network or routing plane fails. In the case being tested, Telemetry collectors can carry sensitive operational data and should be protected by management and access boundaries. The necessary acceptance evidence is: Only authorized sites and administrators can establish collector sessions and logs show approved sources.

D:

Management-plane segmentation reduces the attack surface and common-mode dependency on user traffic. In the case being tested, Telemetry collectors can carry sensitive operational data and should be protected by management and access boundaries. The necessary acceptance evidence is: Only authorized sites and administrators can establish collector sessions and logs show approved sources.

Question 736

Operations wants to avoid recurrence of this design flaw: Network operations want to collect telemetry from every site but will expose the collector publicly to simplify deployment. Which preventive design control MOST DIRECTLY addresses this specific risk?

  1. List critical management applications and size reserved bandwidth under worst-case load.
  2. Test OOB power and link diversity rather than assuming independence from the primary WAN.
  3. Maintain collector certificates, ACL inventories and retention rules in the management standard.
  4. Test shared-service failure domains in the disaster-recovery architecture.

Explanation

Correct Answer

C:

Maintain collector certificates, ACL inventories and retention rules in the management standard. This control targets the underlying design risk. Telemetry collectors can carry sensitive operational data and should be protected by management and access boundaries. The follow-up acceptance check remains: Only authorized sites and administrators can establish collector sessions and logs show approved sources.

Incorrect Answers

A:

Critical management flows can be protected from starvation by a coherent end-to-end QoS policy. The repeat risk here is different: Telemetry collectors can carry sensitive operational data and should be protected by management and access boundaries. A directly relevant preventive control is: Maintain collector certificates, ACL inventories and retention rules in the management standard.

B:

OOB management can remain accessible when an in-band production network or routing plane fails. The repeat risk here is different: Telemetry collectors can carry sensitive operational data and should be protected by management and access boundaries. A directly relevant preventive control is: Maintain collector certificates, ACL inventories and retention rules in the management standard.

D:

Shared management and infrastructure services become dependencies that can undermine an otherwise redundant routed network. The repeat risk here is different: Telemetry collectors can carry sensitive operational data and should be protected by management and access boundaries. A directly relevant preventive control is: Maintain collector certificates, ACL inventories and retention rules in the management standard.

Question 737

A Cisco enterprise designer reviews the following scenario: During a predeployment review for a hospital regional backbone, the team discovers this design gap: network operations want to collect telemetry from every site but will expose the collector publicly to simplify deployment. An approval gate requires both a measurable acceptance check and a durable prevention control. Which action MOST DIRECTLY meets the stated design requirement?

  1. Use authenticated encrypted collection paths and a segmented management architecture instead of unrestricted Internet exposure.
  2. Separate management reachability into an appropriate management VRF or dedicated management network with restricted access.
  3. Provide available or redundant network-service endpoints reachable from the disaster-recovery failure domain.
  4. Use an appropriate traffic policer at the guest policy boundary.

Explanation

Correct Answer

A:

Use authenticated encrypted collection paths and a segmented management architecture instead of unrestricted Internet exposure. This action addresses the stated design problem. Telemetry collectors can carry sensitive operational data and should be protected by management and access boundaries. A practical confirmation is: Only authorized sites and administrators can establish collector sessions and logs show approved sources. The hospital regional backbone acceptance record also captures this result.

Incorrect Answers

B:

Management-plane segmentation reduces the attack surface and common-mode dependency on user traffic. The actual fault is governed by a different mechanism: Telemetry collectors can carry sensitive operational data and should be protected by management and access boundaries. The needed response is: Use authenticated encrypted collection paths and a segmented management architecture instead of unrestricted Internet exposure.

C:

Shared management and infrastructure services become dependencies that can undermine an otherwise redundant routed network. The actual fault is governed by a different mechanism: Telemetry collectors can carry sensitive operational data and should be protected by management and access boundaries. The needed response is: Use authenticated encrypted collection paths and a segmented management architecture instead of unrestricted Internet exposure.

D:

Policing measures traffic against a rate profile and can drop or remark excess traffic rather than delaying it in a shaping queue. The actual fault is governed by a different mechanism: Telemetry collectors can carry sensitive operational data and should be protected by management and access boundaries. The needed response is: Use authenticated encrypted collection paths and a segmented management architecture instead of unrestricted Internet exposure.

Question 738

The network architecture board discusses the following: During a predeployment review for a hospital regional backbone, the team discovers this design gap: network operations want to collect telemetry from every site but will expose the collector publicly to simplify deployment. An approval gate requires both a measurable acceptance check and a durable prevention control. Which technical principle BEST explains the design decision?

  1. Management-plane segmentation reduces the attack surface and common-mode dependency on user traffic.
  2. Telemetry collectors can carry sensitive operational data and should be protected by management and access boundaries.
  3. Critical management flows can be protected from starvation by a coherent end-to-end QoS policy.
  4. End-to-end QoS behavior depends on consistent class mapping across each administrative transport domain.

Explanation

Correct Answer

B:

Telemetry collectors can carry sensitive operational data and should be protected by management and access boundaries. The correct engineering response is: Use authenticated encrypted collection paths and a segmented management architecture instead of unrestricted Internet exposure. The observable check is: Only authorized sites and administrators can establish collector sessions and logs show approved sources. The hospital regional backbone acceptance record also captures this result.

Incorrect Answers

A:

Telemetry collectors can carry sensitive operational data and should be protected by management and access boundaries. The offered choice instead concerns a different principle: Management-plane segmentation reduces the attack surface and common-mode dependency on user traffic. Those technical conditions are not interchangeable.

C:

Telemetry collectors can carry sensitive operational data and should be protected by management and access boundaries. The offered choice instead concerns a different principle: Critical management flows can be protected from starvation by a coherent end-to-end QoS policy. Those technical conditions are not interchangeable.

D:

Telemetry collectors can carry sensitive operational data and should be protected by management and access boundaries. The offered choice instead concerns a different principle: End-to-end QoS behavior depends on consistent class mapping across each administrative transport domain. Those technical conditions are not interchangeable.

Question 739

The infrastructure team must validate this situation: During a predeployment review for a hospital regional backbone, the team discovers this design gap: network operations want to collect telemetry from every site but will expose the collector publicly to simplify deployment. An approval gate requires both a measurable acceptance check and a durable prevention control. Which acceptance observation BEST establishes the intended result?

  1. During an induced production outage, an authorized operator reaches device console or management endpoints through OOB.
  2. Only approved jump hosts can reach management interfaces and user VLANs cannot enter the management segment.
  3. Only authorized sites and administrators can establish collector sessions and logs show approved sources. The hospital regional backbone acceptance record also captures this result.
  4. SSH, telemetry and route-monitoring traffic remain usable during sustained bulk transfers.

Explanation

Correct Answer

C:

Only authorized sites and administrators can establish collector sessions and logs show approved sources. The hospital regional backbone acceptance record also captures this result. Telemetry collectors can carry sensitive operational data and should be protected by management and access boundaries.

Incorrect Answers

A:

OOB management can remain accessible when an in-band production network or routing plane fails. In the case being tested, Telemetry collectors can carry sensitive operational data and should be protected by management and access boundaries. The necessary acceptance evidence is: Only authorized sites and administrators can establish collector sessions and logs show approved sources. The hospital regional backbone acceptance record also captures this result.

B:

Management-plane segmentation reduces the attack surface and common-mode dependency on user traffic. In the case being tested, Telemetry collectors can carry sensitive operational data and should be protected by management and access boundaries. The necessary acceptance evidence is: Only authorized sites and administrators can establish collector sessions and logs show approved sources. The hospital regional backbone acceptance record also captures this result.

D:

Critical management flows can be protected from starvation by a coherent end-to-end QoS policy. In the case being tested, Telemetry collectors can carry sensitive operational data and should be protected by management and access boundaries. The necessary acceptance evidence is: Only authorized sites and administrators can establish collector sessions and logs show approved sources. The hospital regional backbone acceptance record also captures this result.

Question 740

A post-incident design review discusses the following: During a predeployment review for a hospital regional backbone, the team discovers this design gap: network operations want to collect telemetry from every site but will expose the collector publicly to simplify deployment. An approval gate requires both a measurable acceptance check and a durable prevention control. Which preventive design control MOST DIRECTLY addresses this specific risk?

  1. Test OOB power and link diversity rather than assuming independence from the primary WAN.
  2. Review management ACLs, AAA and break-glass access in each security audit.
  3. Test shared-service failure domains in the disaster-recovery architecture.
  4. Maintain collector certificates, ACL inventories and retention rules in the management standard. Apply the same control to the hospital regional backbone rollout checklist.

Explanation

Correct Answer

D:

Maintain collector certificates, ACL inventories and retention rules in the management standard. Apply the same control to the hospital regional backbone rollout checklist. This control targets the underlying design risk. Telemetry collectors can carry sensitive operational data and should be protected by management and access boundaries. The follow-up acceptance check remains: Only authorized sites and administrators can establish collector sessions and logs show approved sources. The hospital regional backbone acceptance record also captures this result.

Incorrect Answers

A:

OOB management can remain accessible when an in-band production network or routing plane fails. The repeat risk here is different: Telemetry collectors can carry sensitive operational data and should be protected by management and access boundaries. A directly relevant preventive control is: Maintain collector certificates, ACL inventories and retention rules in the management standard. Apply the same control to the hospital regional backbone rollout checklist.

B:

Management-plane segmentation reduces the attack surface and common-mode dependency on user traffic. The repeat risk here is different: Telemetry collectors can carry sensitive operational data and should be protected by management and access boundaries. A directly relevant preventive control is: Maintain collector certificates, ACL inventories and retention rules in the management standard. Apply the same control to the hospital regional backbone rollout checklist.

C:

Shared management and infrastructure services become dependencies that can undermine an otherwise redundant routed network. The repeat risk here is different: Telemetry collectors can carry sensitive operational data and should be protected by management and access boundaries. A directly relevant preventive control is: Maintain collector certificates, ACL inventories and retention rules in the management standard. Apply the same control to the hospital regional backbone rollout checklist.