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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 90

Question 890

The design record describes this issue: Application developers need managed runtimes and deployment tooling while avoiding VM operating-system administration. Which technical principle BEST explains the design decision?

  1. Hybrid cloud connects distinct private and public operating environments while retaining different control and residency responsibilities.
  2. SaaS normally delivers provider-managed finished applications to consumers instead of raw infrastructure building blocks.
  3. NETCONF and RESTCONF may access YANG-modeled data but use different transport and operation encodings.
  4. PaaS supplies managed application runtime and platform capabilities while customers typically manage their code and data.

Explanation

Correct Answer

D:

PaaS supplies managed application runtime and platform capabilities while customers typically manage their code and data. The correct engineering response is: Use a suitable Platform-as-a-Service environment aligned with the application stack. The observable check is: The application deploys through the platform and the provider manages underlying runtime host infrastructure.

Incorrect Answers

A:

PaaS supplies managed application runtime and platform capabilities while customers typically manage their code and data. The offered choice instead concerns a different principle: Hybrid cloud connects distinct private and public operating environments while retaining different control and residency responsibilities. Those technical conditions are not interchangeable.

B:

PaaS supplies managed application runtime and platform capabilities while customers typically manage their code and data. The offered choice instead concerns a different principle: SaaS normally delivers provider-managed finished applications to consumers instead of raw infrastructure building blocks. Those technical conditions are not interchangeable.

C:

PaaS supplies managed application runtime and platform capabilities while customers typically manage their code and data. The offered choice instead concerns a different principle: NETCONF and RESTCONF may access YANG-modeled data but use different transport and operation encodings. Those technical conditions are not interchangeable.

Question 891

After designing a change for the following scenario: Application developers need managed runtimes and deployment tooling while avoiding VM operating-system administration. Which acceptance observation BEST establishes the intended result?

  1. The application deploys through the platform and the provider manages underlying runtime host infrastructure.
  2. Researchers provision VMs and control the guest image and installed software as required.
  3. Only authorized data crosses the hybrid boundary and monitoring shows expected routes and policy enforcement.
  4. A staged change commits atomically where supported and a failed validation leaves running configuration unchanged.

Explanation

Correct Answer

A:

The application deploys through the platform and the provider manages underlying runtime host infrastructure. PaaS supplies managed application runtime and platform capabilities while customers typically manage their code and data.

Incorrect Answers

B:

IaaS provides compute, storage and network building blocks while the customer typically manages the guest OS and workloads. In the case being tested, PaaS supplies managed application runtime and platform capabilities while customers typically manage their code and data. The necessary acceptance evidence is: The application deploys through the platform and the provider manages underlying runtime host infrastructure.

C:

Hybrid cloud connects distinct private and public operating environments while retaining different control and residency responsibilities. In the case being tested, PaaS supplies managed application runtime and platform capabilities while customers typically manage their code and data. The necessary acceptance evidence is: The application deploys through the platform and the provider manages underlying runtime host infrastructure.

D:

NETCONF uses structured RPC operations and can support explicit configuration datastores and commit controls. In the case being tested, PaaS supplies managed application runtime and platform capabilities while customers typically manage their code and data. The necessary acceptance evidence is: The application deploys through the platform and the provider manages underlying runtime host infrastructure.

Question 892

A preventive architecture review covers this situation: Application developers need managed runtimes and deployment tooling while avoiding VM operating-system administration. Which preventive design control MOST DIRECTLY addresses this specific risk?

  1. Maintain data-classification, routing and identity controls for hybrid interconnection.
  2. Review portability, runtime version support and application security ownership.
  3. Track guest patching, access controls and backup ownership for each IaaS workload.
  4. Monitor collector timestamp drift and sample loss across site outages.

Explanation

Correct Answer

B:

Review portability, runtime version support and application security ownership. This control targets the underlying design risk. PaaS supplies managed application runtime and platform capabilities while customers typically manage their code and data. The follow-up acceptance check remains: The application deploys through the platform and the provider manages underlying runtime host infrastructure.

Incorrect Answers

A:

Hybrid cloud connects distinct private and public operating environments while retaining different control and residency responsibilities. The repeat risk here is different: PaaS supplies managed application runtime and platform capabilities while customers typically manage their code and data. A directly relevant preventive control is: Review portability, runtime version support and application security ownership.

C:

IaaS provides compute, storage and network building blocks while the customer typically manages the guest OS and workloads. The repeat risk here is different: PaaS supplies managed application runtime and platform capabilities while customers typically manage their code and data. A directly relevant preventive control is: Review portability, runtime version support and application security ownership.

D:

Periodic publication delivers time-indexed samples for rate and trend calculations independently of event changes. The repeat risk here is different: PaaS supplies managed application runtime and platform capabilities while customers typically manage their code and data. A directly relevant preventive control is: Review portability, runtime version support and application security ownership.

Question 893

A new campus or WAN review presents this constraint: A research group needs control over virtual machines, disk images and guest operating systems in the cloud. Which action MOST DIRECTLY meets the stated design requirement?

  1. Choose an appropriate Software-as-a-Service offering.
  2. Use a suitable Platform-as-a-Service environment aligned with the application stack.
  3. Prefer NETCONF where its datastores, locking and candidate/commit operations satisfy the workflow.
  4. Use an Infrastructure-as-a-Service model with documented customer OS responsibilities.

Explanation

Correct Answer

D:

Use an Infrastructure-as-a-Service model with documented customer OS responsibilities. This action addresses the stated design problem. IaaS provides compute, storage and network building blocks while the customer typically manages the guest OS and workloads. A practical confirmation is: Researchers provision VMs and control the guest image and installed software as required.

Incorrect Answers

A:

SaaS normally delivers provider-managed finished applications to consumers instead of raw infrastructure building blocks. The actual fault is governed by a different mechanism: IaaS provides compute, storage and network building blocks while the customer typically manages the guest OS and workloads. The needed response is: Use an Infrastructure-as-a-Service model with documented customer OS responsibilities.

B:

PaaS supplies managed application runtime and platform capabilities while customers typically manage their code and data. The actual fault is governed by a different mechanism: IaaS provides compute, storage and network building blocks while the customer typically manages the guest OS and workloads. The needed response is: Use an Infrastructure-as-a-Service model with documented customer OS responsibilities.

C:

NETCONF uses structured RPC operations and can support explicit configuration datastores and commit controls. The actual fault is governed by a different mechanism: IaaS provides compute, storage and network building blocks while the customer typically manages the guest OS and workloads. The needed response is: Use an Infrastructure-as-a-Service model with documented customer OS responsibilities.

Question 894

For this Cisco ENSLD design case: A research group needs control over virtual machines, disk images and guest operating systems in the cloud. Which technical principle BEST explains the design decision?

  1. IaaS provides compute, storage and network building blocks while the customer typically manages the guest OS and workloads.
  2. PaaS supplies managed application runtime and platform capabilities while customers typically manage their code and data.
  3. Hybrid cloud connects distinct private and public operating environments while retaining different control and residency responsibilities.
  4. Streaming telemetry can reduce repetitive per-device polling overhead and provide structured timely updates.

Explanation

Correct Answer

A:

IaaS provides compute, storage and network building blocks while the customer typically manages the guest OS and workloads. The correct engineering response is: Use an Infrastructure-as-a-Service model with documented customer OS responsibilities. The observable check is: Researchers provision VMs and control the guest image and installed software as required.

Incorrect Answers

B:

IaaS provides compute, storage and network building blocks while the customer typically manages the guest OS and workloads. The offered choice instead concerns a different principle: PaaS supplies managed application runtime and platform capabilities while customers typically manage their code and data. Those technical conditions are not interchangeable.

C:

IaaS provides compute, storage and network building blocks while the customer typically manages the guest OS and workloads. The offered choice instead concerns a different principle: Hybrid cloud connects distinct private and public operating environments while retaining different control and residency responsibilities. Those technical conditions are not interchangeable.

D:

IaaS provides compute, storage and network building blocks while the customer typically manages the guest OS and workloads. The offered choice instead concerns a different principle: Streaming telemetry can reduce repetitive per-device polling overhead and provide structured timely updates. Those technical conditions are not interchangeable.

Question 895

During acceptance testing for this network design: A research group needs control over virtual machines, disk images and guest operating systems in the cloud. Which acceptance observation BEST establishes the intended result?

  1. Users access the supported application without the enterprise managing its underlying server OS.
  2. Researchers provision VMs and control the guest image and installed software as required.
  3. Only authorized data crosses the hybrid boundary and monitoring shows expected routes and policy enforcement.
  4. A controlled interface-state change produces a prompt telemetry update at the collector.

Explanation

Correct Answer

B:

Researchers provision VMs and control the guest image and installed software as required. IaaS provides compute, storage and network building blocks while the customer typically manages the guest OS and workloads.

Incorrect Answers

A:

SaaS normally delivers provider-managed finished applications to consumers instead of raw infrastructure building blocks. In the case being tested, IaaS provides compute, storage and network building blocks while the customer typically manages the guest OS and workloads. The necessary acceptance evidence is: Researchers provision VMs and control the guest image and installed software as required.

C:

Hybrid cloud connects distinct private and public operating environments while retaining different control and residency responsibilities. In the case being tested, IaaS provides compute, storage and network building blocks while the customer typically manages the guest OS and workloads. The necessary acceptance evidence is: Researchers provision VMs and control the guest image and installed software as required.

D:

On-change telemetry publishes when eligible state values change, reducing delay compared with coarse periodic sampling. In the case being tested, IaaS provides compute, storage and network building blocks while the customer typically manages the guest OS and workloads. The necessary acceptance evidence is: Researchers provision VMs and control the guest image and installed software as required.

Question 896

Operations wants to avoid recurrence of this design flaw: A research group needs control over virtual machines, disk images and guest operating systems in the cloud. Which preventive design control MOST DIRECTLY addresses this specific risk?

  1. Review portability, runtime version support and application security ownership.
  2. Capacity-plan subscriptions and apply backpressure or collection tiers for large deployments.
  3. Track guest patching, access controls and backup ownership for each IaaS workload.
  4. Audit route leaks and cloud egress paths before onboarding new sites.

Explanation

Correct Answer

C:

Track guest patching, access controls and backup ownership for each IaaS workload. This control targets the underlying design risk. IaaS provides compute, storage and network building blocks while the customer typically manages the guest OS and workloads. The follow-up acceptance check remains: Researchers provision VMs and control the guest image and installed software as required.

Incorrect Answers

A:

PaaS supplies managed application runtime and platform capabilities while customers typically manage their code and data. The repeat risk here is different: IaaS provides compute, storage and network building blocks while the customer typically manages the guest OS and workloads. A directly relevant preventive control is: Track guest patching, access controls and backup ownership for each IaaS workload.

B:

Streaming telemetry can reduce repetitive per-device polling overhead and provide structured timely updates. The repeat risk here is different: IaaS provides compute, storage and network building blocks while the customer typically manages the guest OS and workloads. A directly relevant preventive control is: Track guest patching, access controls and backup ownership for each IaaS workload.

D:

MPLS or provider WAN integration can extend private routed connectivity toward cloud attachments where the carrier supports it. The repeat risk here is different: IaaS provides compute, storage and network building blocks while the customer typically manages the guest OS and workloads. A directly relevant preventive control is: Track guest patching, access controls and backup ownership for each IaaS workload.

Question 897

A Cisco enterprise designer reviews the following scenario: A regulated enterprise keeps sensitive systems in its own facility but runs approved public-cloud analytics workloads. Which action MOST DIRECTLY meets the stated design requirement?

  1. Design explicit hybrid-cloud connectivity and data-governance boundaries between private and public environments.
  2. Use a suitable Platform-as-a-Service environment aligned with the application stack.
  3. Use an Infrastructure-as-a-Service model with documented customer OS responsibilities.
  4. Evaluate a controlled cloud on-ramp or local Internet breakout for supported SaaS flows.

Explanation

Correct Answer

A:

Design explicit hybrid-cloud connectivity and data-governance boundaries between private and public environments. This action addresses the stated design problem. Hybrid cloud connects distinct private and public operating environments while retaining different control and residency responsibilities. A practical confirmation is: Only authorized data crosses the hybrid boundary and monitoring shows expected routes and policy enforcement.

Incorrect Answers

B:

PaaS supplies managed application runtime and platform capabilities while customers typically manage their code and data. The actual fault is governed by a different mechanism: Hybrid cloud connects distinct private and public operating environments while retaining different control and residency responsibilities. The needed response is: Design explicit hybrid-cloud connectivity and data-governance boundaries between private and public environments.

C:

IaaS provides compute, storage and network building blocks while the customer typically manages the guest OS and workloads. The actual fault is governed by a different mechanism: Hybrid cloud connects distinct private and public operating environments while retaining different control and residency responsibilities. The needed response is: Design explicit hybrid-cloud connectivity and data-governance boundaries between private and public environments.

D:

Cloud on-ramp designs can reduce unnecessary backhaul but must preserve security inspection and policy controls. The actual fault is governed by a different mechanism: Hybrid cloud connects distinct private and public operating environments while retaining different control and residency responsibilities. The needed response is: Design explicit hybrid-cloud connectivity and data-governance boundaries between private and public environments.

Question 898

The network architecture board discusses the following: A regulated enterprise keeps sensitive systems in its own facility but runs approved public-cloud analytics workloads. Which technical principle BEST explains the design decision?

  1. PaaS supplies managed application runtime and platform capabilities while customers typically manage their code and data.
  2. Hybrid cloud connects distinct private and public operating environments while retaining different control and residency responsibilities.
  3. IaaS provides compute, storage and network building blocks while the customer typically manages the guest OS and workloads.
  4. NETCONF and RESTCONF may access YANG-modeled data but use different transport and operation encodings.

Explanation

Correct Answer

B:

Hybrid cloud connects distinct private and public operating environments while retaining different control and residency responsibilities. The correct engineering response is: Design explicit hybrid-cloud connectivity and data-governance boundaries between private and public environments. The observable check is: Only authorized data crosses the hybrid boundary and monitoring shows expected routes and policy enforcement.

Incorrect Answers

A:

Hybrid cloud connects distinct private and public operating environments while retaining different control and residency responsibilities. The offered choice instead concerns a different principle: PaaS supplies managed application runtime and platform capabilities while customers typically manage their code and data. Those technical conditions are not interchangeable.

C:

Hybrid cloud connects distinct private and public operating environments while retaining different control and residency responsibilities. The offered choice instead concerns a different principle: IaaS provides compute, storage and network building blocks while the customer typically manages the guest OS and workloads. Those technical conditions are not interchangeable.

D:

Hybrid cloud connects distinct private and public operating environments while retaining different control and residency responsibilities. The offered choice instead concerns a different principle: NETCONF and RESTCONF may access YANG-modeled data but use different transport and operation encodings. Those technical conditions are not interchangeable.

Question 899

The infrastructure team must validate this situation: A regulated enterprise keeps sensitive systems in its own facility but runs approved public-cloud analytics workloads. Which acceptance observation BEST establishes the intended result?

  1. Researchers provision VMs and control the guest image and installed software as required.
  2. The application deploys through the platform and the provider manages underlying runtime host infrastructure.
  3. Only authorized data crosses the hybrid boundary and monitoring shows expected routes and policy enforcement.
  4. The returned paths contain current interface values without requiring an ongoing subscription.

Explanation

Correct Answer

C:

Only authorized data crosses the hybrid boundary and monitoring shows expected routes and policy enforcement. Hybrid cloud connects distinct private and public operating environments while retaining different control and residency responsibilities.

Incorrect Answers

A:

IaaS provides compute, storage and network building blocks while the customer typically manages the guest OS and workloads. In the case being tested, Hybrid cloud connects distinct private and public operating environments while retaining different control and residency responsibilities. The necessary acceptance evidence is: Only authorized data crosses the hybrid boundary and monitoring shows expected routes and policy enforcement.

B:

PaaS supplies managed application runtime and platform capabilities while customers typically manage their code and data. In the case being tested, Hybrid cloud connects distinct private and public operating environments while retaining different control and residency responsibilities. The necessary acceptance evidence is: Only authorized data crosses the hybrid boundary and monitoring shows expected routes and policy enforcement.

D:

gNMI Get retrieves selected modeled paths, while Subscribe handles streaming or subscription behavior. In the case being tested, Hybrid cloud connects distinct private and public operating environments while retaining different control and residency responsibilities. The necessary acceptance evidence is: Only authorized data crosses the hybrid boundary and monitoring shows expected routes and policy enforcement.

Question 900

A post-incident design review discusses the following: A regulated enterprise keeps sensitive systems in its own facility but runs approved public-cloud analytics workloads. Which preventive design control MOST DIRECTLY addresses this specific risk?

  1. Document SaaS identity, data handling and provider recovery responsibilities.
  2. Track guest patching, access controls and backup ownership for each IaaS workload.
  3. Separate vendor-specific adapters from reusable domain-level automation logic.
  4. Maintain data-classification, routing and identity controls for hybrid interconnection.

Explanation

Correct Answer

D:

Maintain data-classification, routing and identity controls for hybrid interconnection. This control targets the underlying design risk. Hybrid cloud connects distinct private and public operating environments while retaining different control and residency responsibilities. The follow-up acceptance check remains: Only authorized data crosses the hybrid boundary and monitoring shows expected routes and policy enforcement.

Incorrect Answers

A:

SaaS normally delivers provider-managed finished applications to consumers instead of raw infrastructure building blocks. The repeat risk here is different: Hybrid cloud connects distinct private and public operating environments while retaining different control and residency responsibilities. A directly relevant preventive control is: Maintain data-classification, routing and identity controls for hybrid interconnection.

B:

IaaS provides compute, storage and network building blocks while the customer typically manages the guest OS and workloads. The repeat risk here is different: Hybrid cloud connects distinct private and public operating environments while retaining different control and residency responsibilities. A directly relevant preventive control is: Maintain data-classification, routing and identity controls for hybrid interconnection.

C:

Native models expose device-specific data that may not map exactly to a standards-based OpenConfig schema. The repeat risk here is different: Hybrid cloud connects distinct private and public operating environments while retaining different control and residency responsibilities. A directly relevant preventive control is: Maintain data-classification, routing and identity controls for hybrid interconnection.