McAfee Secure

Cisco 300-420 Bundle

Exam Code: 300-420

Exam Name Designing Cisco Enterprise Networks (ENSLD)

Certification Provider: Cisco

Corresponding Certification: CCNP Enterprise

Cisco 300-420 Bundle $25.00
300-420 Sample 1 300-420 Sample 2 300-420 Sample 3 300-420 Sample 4 300-420 Sample 5 300-420 Sample 6 300-420 Sample 7 300-420 Sample 8 300-420 Sample 9 300-420 Sample 10

100% Cisco 300-420 Guaranteed Success With Testking Training Materials

Get Real 300-420 Exam Questions & Expert Verified Answers as Experienced on the Real Exam!

  • Questions & Answers

    300-420 Questions & Answers

    416 Questions & Answers

    The ultimate exam preparation tool, Questions & Answers mirrors the actual 300-420 exam while allowing you to hone and measure every aspect of your test-taking ability.

  • 300-420 Video Course

    300-420 Training Course

    75 Video Lectures

    300-420 Video Course is developed by Cisco Professionals to help you pass the 300-420 exam.

    Description

    This course will improve your knowledge and skills required to pass Designing Cisco Enterprise Networks (ENSLD) exam.

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

Satisfaction Guaranteed

Money Back Guarantee

Testking provides hassle-free money back guarantee with our products. That is because we have 100% trust in the abilities of our professional and experience product team, and our record is a proof of that.

99.6% PASS RATE
Total Cost: $164.98
Bundle Price: $139.98

Purchase Individually

  • Questions & Answers

    Questions & Answers

    416 Questions

    $124.99
  • 300-420 Video Course

    Training Course

    75 Video Lectures

    $39.99

Cisco 300-420 Practice Test 41

Question 400

Operations wants to avoid recurrence of this design flaw: During a predeployment review for a new headquarters building, the team discovers this design gap: a four-campus network has full mesh links that cause uneven routing, expensive operations and unclear failure behavior. 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. Tie building subnet allocation rules to tested summarization policies.
  2. Review cross-VRF route targets or leaks as formal security change requests.
  3. Reassess traffic matrices and failure domains after each new campus onboarding. Apply the same control to the new headquarters building rollout checklist.
  4. Maintain a centralized redistribution matrix and prevent untagged re-imports.

Explanation

Correct Answer

C:

Reassess traffic matrices and failure domains after each new campus onboarding. Apply the same control to the new headquarters building rollout checklist. This control targets the underlying design risk. A documented hierarchy can limit topology complexity while preserving critical backup paths. The follow-up acceptance check remains: Simulated hub failure preserves required cross-campus flows within latency and convergence targets. The new headquarters building acceptance record also captures this result.

Incorrect Answers

A:

Route summarization reduces upstream route detail and contains changes within appropriate campus areas. The repeat risk here is different: a documented hierarchy can limit topology complexity while preserving critical backup paths. A directly relevant preventive control is: Reassess traffic matrices and failure domains after each new campus onboarding. Apply the same control to the new headquarters building rollout checklist.

B:

VRFs maintain logically separate routing and forwarding contexts on capable shared devices. The repeat risk here is different: a documented hierarchy can limit topology complexity while preserving critical backup paths. A directly relevant preventive control is: Reassess traffic matrices and failure domains after each new campus onboarding. Apply the same control to the new headquarters building rollout checklist.

D:

Two-way redistribution can reintroduce routes into their source protocol without policy guards. The repeat risk here is different: a documented hierarchy can limit topology complexity while preserving critical backup paths. A directly relevant preventive control is: Reassess traffic matrices and failure domains after each new campus onboarding. Apply the same control to the new headquarters building rollout checklist.

Question 401

A Cisco enterprise designer reviews the following scenario: A distribution network learns thousands of access prefixes despite each building owning a contiguous addressing block. Which action MOST DIRECTLY meets the stated design requirement?

  1. Summarize routes at each building’s Layer 3 aggregation boundary using valid address plan blocks.
  2. Control redistribution with route tagging, filtering and clearly defined ownership of redistributed prefixes.
  3. Use VRFs with explicit route-leak policy only for approved shared services.
  4. Design available control-plane nodes and their capacity for endpoint-to-location mapping.

Explanation

Correct Answer

A:

Summarize routes at each building’s Layer 3 aggregation boundary using valid address plan blocks. This action addresses the stated design problem. Route summarization reduces upstream route detail and contains changes within appropriate campus areas. A practical confirmation is: The core retains working building aggregates without unnecessary component-prefix churn.

Incorrect Answers

B:

Two-way redistribution can reintroduce routes into their source protocol without policy guards. The actual fault is governed by a different mechanism: Route summarization reduces upstream route detail and contains changes within appropriate campus areas. The needed response is: Summarize routes at each building’s Layer 3 aggregation boundary using valid address plan blocks.

C:

VRFs maintain logically separate routing and forwarding contexts on capable shared devices. The actual fault is governed by a different mechanism: Route summarization reduces upstream route detail and contains changes within appropriate campus areas. The needed response is: Summarize routes at each building’s Layer 3 aggregation boundary using valid address plan blocks.

D:

The fabric control plane tracks endpoint identity or location to guide overlay forwarding. The actual fault is governed by a different mechanism: Route summarization reduces upstream route detail and contains changes within appropriate campus areas. The needed response is: Summarize routes at each building’s Layer 3 aggregation boundary using valid address plan blocks.

Question 402

The network architecture board discusses the following: A distribution network learns thousands of access prefixes despite each building owning a contiguous addressing block. Which technical principle BEST explains the design decision?

  1. Two-way redistribution can reintroduce routes into their source protocol without policy guards.
  2. Route summarization reduces upstream route detail and contains changes within appropriate campus areas.
  3. A documented hierarchy can limit topology complexity while preserving critical backup paths.
  4. An SDA border performs controlled connectivity between fabric virtual networks and networks outside the fabric.

Explanation

Correct Answer

B:

Route summarization reduces upstream route detail and contains changes within appropriate campus areas. The correct engineering response is: Summarize routes at each building’s Layer 3 aggregation boundary using valid address plan blocks. The observable check is: The core retains working building aggregates without unnecessary component-prefix churn.

Incorrect Answers

A:

Route summarization reduces upstream route detail and contains changes within appropriate campus areas. The offered choice instead concerns a different principle: Two-way redistribution can reintroduce routes into their source protocol without policy guards. Those technical conditions are not interchangeable.

C:

Route summarization reduces upstream route detail and contains changes within appropriate campus areas. The offered choice instead concerns a different principle: a documented hierarchy can limit topology complexity while preserving critical backup paths. Those technical conditions are not interchangeable.

D:

Route summarization reduces upstream route detail and contains changes within appropriate campus areas. The offered choice instead concerns a different principle: an SDA border performs controlled connectivity between fabric virtual networks and networks outside the fabric. Those technical conditions are not interchangeable.

Question 403

The infrastructure team must validate this situation: A distribution network learns thousands of access prefixes despite each building owning a contiguous addressing block. Which acceptance observation BEST establishes the intended result?

  1. Tenant prefixes remain isolated while selected shared-service routes appear only where authorized.
  2. Simulated hub failure preserves required cross-campus flows within latency and convergence targets.
  3. The core retains working building aggregates without unnecessary component-prefix churn.
  4. Clients receive leases only from approved DHCP servers and rogue offers are dropped.

Explanation

Correct Answer

C:

The core retains working building aggregates without unnecessary component-prefix churn. Route summarization reduces upstream route detail and contains changes within appropriate campus areas.

Incorrect Answers

A:

VRFs maintain logically separate routing and forwarding contexts on capable shared devices. In the case being tested, Route summarization reduces upstream route detail and contains changes within appropriate campus areas. The necessary acceptance evidence is: The core retains working building aggregates without unnecessary component-prefix churn.

B:

A documented hierarchy can limit topology complexity while preserving critical backup paths. In the case being tested, Route summarization reduces upstream route detail and contains changes within appropriate campus areas. The necessary acceptance evidence is: The core retains working building aggregates without unnecessary component-prefix churn.

D:

DHCP snooping separates trusted DHCP sources from untrusted access ports and can block rogue server messages. In the case being tested, Route summarization reduces upstream route detail and contains changes within appropriate campus areas. The necessary acceptance evidence is: The core retains working building aggregates without unnecessary component-prefix churn.

Question 404

A post-incident design review discusses the following: A distribution network learns thousands of access prefixes despite each building owning a contiguous addressing block. Which preventive design control MOST DIRECTLY addresses this specific risk?

  1. Review each proposed VLAN extension against documented mobility or application requirements.
  2. Review cross-VRF route targets or leaks as formal security change requests.
  3. Reassess traffic matrices and failure domains after each new campus onboarding.
  4. Tie building subnet allocation rules to tested summarization policies.

Explanation

Correct Answer

D:

Tie building subnet allocation rules to tested summarization policies. This control targets the underlying design risk. Route summarization reduces upstream route detail and contains changes within appropriate campus areas. The follow-up acceptance check remains: The core retains working building aggregates without unnecessary component-prefix churn.

Incorrect Answers

A:

Routing boundaries limit broadcast and spanning-tree failure domains compared with indiscriminate Layer 2 stretch. The repeat risk here is different: Route summarization reduces upstream route detail and contains changes within appropriate campus areas. A directly relevant preventive control is: Tie building subnet allocation rules to tested summarization policies.

B:

VRFs maintain logically separate routing and forwarding contexts on capable shared devices. The repeat risk here is different: Route summarization reduces upstream route detail and contains changes within appropriate campus areas. A directly relevant preventive control is: Tie building subnet allocation rules to tested summarization policies.

C:

A documented hierarchy can limit topology complexity while preserving critical backup paths. The repeat risk here is different: Route summarization reduces upstream route detail and contains changes within appropriate campus areas. A directly relevant preventive control is: Tie building subnet allocation rules to tested summarization policies.

Question 405

During a network design workshop, the team finds this issue: During a predeployment review for a public-sector campus, the team discovers this design gap: a distribution network learns thousands of access prefixes despite each building owning a contiguous addressing block. An approval gate requires both a measurable acceptance check and a durable prevention control. Which action MOST DIRECTLY meets the stated design requirement?

  1. Choose a hierarchical dual-hub or partial-mesh routed topology based on traffic, latency and resilience requirements.
  2. Summarize routes at each building’s Layer 3 aggregation boundary using valid address plan blocks.
  3. Use routed Layer 3 boundaries and local VLANs unless a justified extension requirement exists.
  4. Use separate virtual networks and appropriate group-based policy instead of merely renaming VLANs.

Explanation

Correct Answer

B:

Summarize routes at each building’s Layer 3 aggregation boundary using valid address plan blocks. This action addresses the stated design problem. Route summarization reduces upstream route detail and contains changes within appropriate campus areas. A practical confirmation is: The core retains working building aggregates without unnecessary component-prefix churn. The public-sector campus acceptance record also captures this result.

Incorrect Answers

A:

A documented hierarchy can limit topology complexity while preserving critical backup paths. The actual fault is governed by a different mechanism: Route summarization reduces upstream route detail and contains changes within appropriate campus areas. The needed response is: Summarize routes at each building’s Layer 3 aggregation boundary using valid address plan blocks.

C:

Routing boundaries limit broadcast and spanning-tree failure domains compared with indiscriminate Layer 2 stretch. The actual fault is governed by a different mechanism: Route summarization reduces upstream route detail and contains changes within appropriate campus areas. The needed response is: Summarize routes at each building’s Layer 3 aggregation boundary using valid address plan blocks.

D:

SDA virtualization separates routing domains, while identity-based segmentation can further control communication. The actual fault is governed by a different mechanism: Route summarization reduces upstream route detail and contains changes within appropriate campus areas. The needed response is: Summarize routes at each building’s Layer 3 aggregation boundary using valid address plan blocks.

Question 406

In a technical design review: During a predeployment review for a public-sector campus, the team discovers this design gap: a distribution network learns thousands of access prefixes despite each building owning a contiguous addressing block. An approval gate requires both a measurable acceptance check and a durable prevention control. Which technical principle BEST explains the design decision?

  1. A documented hierarchy can limit topology complexity while preserving critical backup paths.
  2. Two-way redistribution can reintroduce routes into their source protocol without policy guards.
  3. Route summarization reduces upstream route detail and contains changes within appropriate campus areas.
  4. VRFs maintain logically separate routing and forwarding contexts on capable shared devices.

Explanation

Correct Answer

C:

Route summarization reduces upstream route detail and contains changes within appropriate campus areas. The correct engineering response is: Summarize routes at each building’s Layer 3 aggregation boundary using valid address plan blocks. The observable check is: The core retains working building aggregates without unnecessary component-prefix churn. The public-sector campus acceptance record also captures this result.

Incorrect Answers

A:

Route summarization reduces upstream route detail and contains changes within appropriate campus areas. The offered choice instead concerns a different principle: a documented hierarchy can limit topology complexity while preserving critical backup paths. Those technical conditions are not interchangeable.

B:

Route summarization reduces upstream route detail and contains changes within appropriate campus areas. The offered choice instead concerns a different principle: Two-way redistribution can reintroduce routes into their source protocol without policy guards. Those technical conditions are not interchangeable.

D:

Route summarization reduces upstream route detail and contains changes within appropriate campus areas. The offered choice instead concerns a different principle: VRFs maintain logically separate routing and forwarding contexts on capable shared devices. Those technical conditions are not interchangeable.

Question 407

An engineering reviewer needs objective proof for the following: During a predeployment review for a public-sector campus, the team discovers this design gap: a distribution network learns thousands of access prefixes despite each building owning a contiguous addressing block. An approval gate requires both a measurable acceptance check and a durable prevention control. Which acceptance observation BEST establishes the intended result?

  1. Tenant prefixes remain isolated while selected shared-service routes appear only where authorized.
  2. A local Layer 2 fault does not propagate across the site interconnect and routed applications remain reachable.
  3. Test prefixes appear only in approved protocols with expected tags and no persistent route oscillation.
  4. The core retains working building aggregates without unnecessary component-prefix churn. The public-sector campus acceptance record also captures this result.

Explanation

Correct Answer

D:

The core retains working building aggregates without unnecessary component-prefix churn. The public-sector campus acceptance record also captures this result. Route summarization reduces upstream route detail and contains changes within appropriate campus areas.

Incorrect Answers

A:

VRFs maintain logically separate routing and forwarding contexts on capable shared devices. In the case being tested, Route summarization reduces upstream route detail and contains changes within appropriate campus areas. The necessary acceptance evidence is: The core retains working building aggregates without unnecessary component-prefix churn. The public-sector campus acceptance record also captures this result.

B:

Routing boundaries limit broadcast and spanning-tree failure domains compared with indiscriminate Layer 2 stretch. In the case being tested, Route summarization reduces upstream route detail and contains changes within appropriate campus areas. The necessary acceptance evidence is: The core retains working building aggregates without unnecessary component-prefix churn. The public-sector campus acceptance record also captures this result.

C:

Two-way redistribution can reintroduce routes into their source protocol without policy guards. In the case being tested, Route summarization reduces upstream route detail and contains changes within appropriate campus areas. The necessary acceptance evidence is: The core retains working building aggregates without unnecessary component-prefix churn. The public-sector campus acceptance record also captures this result.

Question 408

The change advisory board sees a repeat risk in this case: During a predeployment review for a public-sector campus, the team discovers this design gap: a distribution network learns thousands of access prefixes despite each building owning a contiguous addressing block. 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. Tie building subnet allocation rules to tested summarization policies. Apply the same control to the public-sector campus rollout checklist.
  2. Reassess traffic matrices and failure domains after each new campus onboarding.
  3. Review each proposed VLAN extension against documented mobility or application requirements.
  4. Maintain a centralized redistribution matrix and prevent untagged re-imports.

Explanation

Correct Answer

A:

Tie building subnet allocation rules to tested summarization policies. Apply the same control to the public-sector campus rollout checklist. This control targets the underlying design risk. Route summarization reduces upstream route detail and contains changes within appropriate campus areas. The follow-up acceptance check remains: The core retains working building aggregates without unnecessary component-prefix churn. The public-sector campus acceptance record also captures this result.

Incorrect Answers

B:

A documented hierarchy can limit topology complexity while preserving critical backup paths. The repeat risk here is different: Route summarization reduces upstream route detail and contains changes within appropriate campus areas. A directly relevant preventive control is: Tie building subnet allocation rules to tested summarization policies. Apply the same control to the public-sector campus rollout checklist.

C:

Routing boundaries limit broadcast and spanning-tree failure domains compared with indiscriminate Layer 2 stretch. The repeat risk here is different: Route summarization reduces upstream route detail and contains changes within appropriate campus areas. A directly relevant preventive control is: Tie building subnet allocation rules to tested summarization policies. Apply the same control to the public-sector campus rollout checklist.

D:

Two-way redistribution can reintroduce routes into their source protocol without policy guards. The repeat risk here is different: Route summarization reduces upstream route detail and contains changes within appropriate campus areas. A directly relevant preventive control is: Tie building subnet allocation rules to tested summarization policies. Apply the same control to the public-sector campus rollout checklist.

Question 409

A design team must resolve this enterprise network problem: A planned SD-Access campus uses an MPLS-style underlay address plan without considering fabric-node reachability for VXLAN overlay endpoints. Which action MOST DIRECTLY meets the stated design requirement?

  1. Assign LISP control-plane responsibilities separately from VXLAN data-plane forwarding in the architecture.
  2. Use separate virtual networks and appropriate group-based policy instead of merely renaming VLANs.
  3. Design a routed IP underlay with full fabric-node reachability and predictable MTU for encapsulated traffic.
  4. Provide an approved routed WoL delivery method rather than assuming a Layer 2 broadcast crosses routers automatically.

Explanation

Correct Answer

C:

Design a routed IP underlay with full fabric-node reachability and predictable MTU for encapsulated traffic. This action addresses the stated design problem. An SD-Access overlay depends on a stable IP underlay transporting encapsulated packets between fabric nodes. A practical confirmation is: Fabric edge and border nodes resolve underlay paths and VXLAN test frames traverse without fragmentation faults.

Incorrect Answers

A:

Cisco SD-Access commonly uses LISP mapping/control functions and VXLAN encapsulation to transport overlay traffic. The actual fault is governed by a different mechanism: an SD-Access overlay depends on a stable IP underlay transporting encapsulated packets between fabric nodes. The needed response is: Design a routed IP underlay with full fabric-node reachability and predictable MTU for encapsulated traffic.

B:

SDA virtualization separates routing domains, while identity-based segmentation can further control communication. The actual fault is governed by a different mechanism: an SD-Access overlay depends on a stable IP underlay transporting encapsulated packets between fabric nodes. The needed response is: Design a routed IP underlay with full fabric-node reachability and predictable MTU for encapsulated traffic.

D:

Ordinary local broadcast frames do not propagate across a Layer 3 boundary without an explicit WoL relay design. The actual fault is governed by a different mechanism: an SD-Access overlay depends on a stable IP underlay transporting encapsulated packets between fabric nodes. The needed response is: Design a routed IP underlay with full fabric-node reachability and predictable MTU for encapsulated traffic.

Question 410

The design record describes this issue: A planned SD-Access campus uses an MPLS-style underlay address plan without considering fabric-node reachability for VXLAN overlay endpoints. Which technical principle BEST explains the design decision?

  1. SDA virtualization separates routing domains, while identity-based segmentation can further control communication.
  2. Cisco SD-Access commonly uses LISP mapping/control functions and VXLAN encapsulation to transport overlay traffic.
  3. Two-way redistribution can reintroduce routes into their source protocol without policy guards.
  4. An SD-Access overlay depends on a stable IP underlay transporting encapsulated packets between fabric nodes.

Explanation

Correct Answer

D:

An SD-Access overlay depends on a stable IP underlay transporting encapsulated packets between fabric nodes. The correct engineering response is: Design a routed IP underlay with full fabric-node reachability and predictable MTU for encapsulated traffic. The observable check is: Fabric edge and border nodes resolve underlay paths and VXLAN test frames traverse without fragmentation faults.

Incorrect Answers

A:

An SD-Access overlay depends on a stable IP underlay transporting encapsulated packets between fabric nodes. The offered choice instead concerns a different principle: SDA virtualization separates routing domains, while identity-based segmentation can further control communication. Those technical conditions are not interchangeable.

B:

An SD-Access overlay depends on a stable IP underlay transporting encapsulated packets between fabric nodes. The offered choice instead concerns a different principle: Cisco SD-Access commonly uses LISP mapping/control functions and VXLAN encapsulation to transport overlay traffic. Those technical conditions are not interchangeable.

C:

An SD-Access overlay depends on a stable IP underlay transporting encapsulated packets between fabric nodes. The offered choice instead concerns a different principle: Two-way redistribution can reintroduce routes into their source protocol without policy guards. Those technical conditions are not interchangeable.