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 15

Question 140

A preventive architecture review covers this situation: A remote OSPF area must suppress external routes while retaining ordinary interarea destinations from the backbone. Which preventive design control MOST DIRECTLY addresses this specific risk?

  1. Use interface role templates and audit router-facing versus user-facing ports.
  2. Document the stub-area boundary and check router area-type consistency.
  3. Review area connectivity on topology diagrams before deploying new OSPF sites.
  4. Allocate prefixes by area and test summary behavior during partial site outages.

Explanation

Correct Answer

B:

Document the stub-area boundary and check router area-type consistency. This control targets the underlying design risk. An OSPF stub area restricts external Type 5 LSA flooding while permitting interarea reachability as designed. The follow-up acceptance check remains: The area has no Type 5 external LSAs and still learns expected interarea routes or default access.

Incorrect Answers

A:

Passive OSPF interfaces advertise their connected networks without forming unnecessary neighbor adjacencies. The repeat risk here is different: an OSPF stub area restricts external Type 5 LSA flooding while permitting interarea reachability as designed. A directly relevant preventive control is: Document the stub-area boundary and check router area-type consistency.

C:

OSPF’s normal multiarea hierarchy uses Area 0 as the backbone connecting other areas. The repeat risk here is different: an OSPF stub area restricts external Type 5 LSA flooding while permitting interarea reachability as designed. A directly relevant preventive control is: Document the stub-area boundary and check router area-type consistency.

D:

An OSPF ABR can aggregate interarea prefixes, reducing route detail exported to other areas. The repeat risk here is different: an OSPF stub area restricts external Type 5 LSA flooding while permitting interarea reachability as designed. A directly relevant preventive control is: Document the stub-area boundary and check router area-type consistency.

Question 141

A new campus or WAN review presents this constraint: During a predeployment review for a financial services campus, the team discovers this design gap: a remote OSPF area must suppress external routes while retaining ordinary interarea destinations from the backbone. An approval gate requires both a measurable acceptance check and a durable prevention control. Which action MOST DIRECTLY meets the stated design requirement?

  1. Redesign area boundaries so ordinary interarea connectivity traverses the OSPF backbone.
  2. Keep OSPF enabled only on deliberate transit interfaces and make end-user interfaces passive where supported.
  3. Create a renumbering and conflict-remediation plan before joining the overlapping networks.
  4. Evaluate a stub-area design with all routers in the area using compatible area type.

Explanation

Correct Answer

D:

Evaluate a stub-area design with all routers in the area using compatible area type. This action addresses the stated design problem. An OSPF stub area restricts external Type 5 LSA flooding while permitting interarea reachability as designed. A practical confirmation is: The area has no Type 5 external LSAs and still learns expected interarea routes or default access. The financial services campus acceptance record also captures this result.

Incorrect Answers

A:

OSPF’s normal multiarea hierarchy uses Area 0 as the backbone connecting other areas. The actual fault is governed by a different mechanism: an OSPF stub area restricts external Type 5 LSA flooding while permitting interarea reachability as designed. The needed response is: Evaluate a stub-area design with all routers in the area using compatible area type.

B:

Passive OSPF interfaces advertise their connected networks without forming unnecessary neighbor adjacencies. The actual fault is governed by a different mechanism: an OSPF stub area restricts external Type 5 LSA flooding while permitting interarea reachability as designed. The needed response is: Evaluate a stub-area design with all routers in the area using compatible area type.

C:

Overlapping private address space prevents unambiguous ordinary IP routing between identical prefixes. The actual fault is governed by a different mechanism: an OSPF stub area restricts external Type 5 LSA flooding while permitting interarea reachability as designed. The needed response is: Evaluate a stub-area design with all routers in the area using compatible area type.

Question 142

For this Cisco ENSLD design case: During a predeployment review for a financial services campus, the team discovers this design gap: a remote OSPF area must suppress external routes while retaining ordinary interarea destinations from the backbone. An approval gate requires both a measurable acceptance check and a durable prevention control. Which technical principle BEST explains the design decision?

  1. An OSPF stub area restricts external Type 5 LSA flooding while permitting interarea reachability as designed.
  2. Passive OSPF interfaces advertise their connected networks without forming unnecessary neighbor adjacencies.
  3. OSPF’s normal multiarea hierarchy uses Area 0 as the backbone connecting other areas.
  4. Route reflectors reduce the need for every iBGP speaker to peer with every other speaker, while preserving iBGP route propagation rules.

Explanation

Correct Answer

A:

An OSPF stub area restricts external Type 5 LSA flooding while permitting interarea reachability as designed. The correct engineering response is: Evaluate a stub-area design with all routers in the area using compatible area type. The observable check is: The area has no Type 5 external LSAs and still learns expected interarea routes or default access. The financial services campus acceptance record also captures this result.

Incorrect Answers

B:

An OSPF stub area restricts external Type 5 LSA flooding while permitting interarea reachability as designed. The offered choice instead concerns a different principle: Passive OSPF interfaces advertise their connected networks without forming unnecessary neighbor adjacencies. Those technical conditions are not interchangeable.

C:

An OSPF stub area restricts external Type 5 LSA flooding while permitting interarea reachability as designed. The offered choice instead concerns a different principle: OSPF’s normal multiarea hierarchy uses Area 0 as the backbone connecting other areas. Those technical conditions are not interchangeable.

D:

An OSPF stub area restricts external Type 5 LSA flooding while permitting interarea reachability as designed. The offered choice instead concerns a different principle: Route reflectors reduce the need for every iBGP speaker to peer with every other speaker, while preserving iBGP route propagation rules. Those technical conditions are not interchangeable.

Question 143

During acceptance testing for this network design: During a predeployment review for a financial services campus, the team discovers this design gap: a remote OSPF area must suppress external routes while retaining ordinary interarea destinations from the backbone. An approval gate requires both a measurable acceptance check and a durable prevention control. Which acceptance observation BEST establishes the intended result?

  1. Transit neighbors reach Full state while access interfaces show no unsolicited OSPF adjacencies.
  2. The area has no Type 5 external LSAs and still learns expected interarea routes or default access. The financial services campus acceptance record also captures this result.
  3. The receiving area learns appropriate aggregates and retains working reachability to included component prefixes.
  4. ABRs report appropriate area membership and interarea routes resolve through the intended backbone.

Explanation

Correct Answer

B:

The area has no Type 5 external LSAs and still learns expected interarea routes or default access. The financial services campus acceptance record also captures this result. An OSPF stub area restricts external Type 5 LSA flooding while permitting interarea reachability as designed.

Incorrect Answers

A:

Passive OSPF interfaces advertise their connected networks without forming unnecessary neighbor adjacencies. In the case being tested, an OSPF stub area restricts external Type 5 LSA flooding while permitting interarea reachability as designed. The necessary acceptance evidence is: The area has no Type 5 external LSAs and still learns expected interarea routes or default access. The financial services campus acceptance record also captures this result.

C:

An OSPF ABR can aggregate interarea prefixes, reducing route detail exported to other areas. In the case being tested, an OSPF stub area restricts external Type 5 LSA flooding while permitting interarea reachability as designed. The necessary acceptance evidence is: The area has no Type 5 external LSAs and still learns expected interarea routes or default access. The financial services campus acceptance record also captures this result.

D:

OSPF’s normal multiarea hierarchy uses Area 0 as the backbone connecting other areas. In the case being tested, an OSPF stub area restricts external Type 5 LSA flooding while permitting interarea reachability as designed. The necessary acceptance evidence is: The area has no Type 5 external LSAs and still learns expected interarea routes or default access. The financial services campus acceptance record also captures this result.

Question 144

Operations wants to avoid recurrence of this design flaw: During a predeployment review for a financial services campus, the team discovers this design gap: a remote OSPF area must suppress external routes while retaining ordinary interarea destinations from the backbone. 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. Review area connectivity on topology diagrams before deploying new OSPF sites.
  2. Allocate prefixes by area and test summary behavior during partial site outages.
  3. Document the stub-area boundary and check router area-type consistency. Apply the same control to the financial services campus rollout checklist.
  4. Review NSSA translator redundancy and route-leak policy before rollout.

Explanation

Correct Answer

C:

Document the stub-area boundary and check router area-type consistency. Apply the same control to the financial services campus rollout checklist. This control targets the underlying design risk. An OSPF stub area restricts external Type 5 LSA flooding while permitting interarea reachability as designed. The follow-up acceptance check remains: The area has no Type 5 external LSAs and still learns expected interarea routes or default access. The financial services campus acceptance record also captures this result.

Incorrect Answers

A:

OSPF’s normal multiarea hierarchy uses Area 0 as the backbone connecting other areas. The repeat risk here is different: an OSPF stub area restricts external Type 5 LSA flooding while permitting interarea reachability as designed. A directly relevant preventive control is: Document the stub-area boundary and check router area-type consistency. Apply the same control to the financial services campus rollout checklist.

B:

An OSPF ABR can aggregate interarea prefixes, reducing route detail exported to other areas. The repeat risk here is different: an OSPF stub area restricts external Type 5 LSA flooding while permitting interarea reachability as designed. A directly relevant preventive control is: Document the stub-area boundary and check router area-type consistency. Apply the same control to the financial services campus rollout checklist.

D:

An OSPF NSSA can originate Type 7 external information and translate it at an eligible ABR. The repeat risk here is different: an OSPF stub area restricts external Type 5 LSA flooding while permitting interarea reachability as designed. A directly relevant preventive control is: Document the stub-area boundary and check router area-type consistency. Apply the same control to the financial services campus rollout checklist.

Question 145

A Cisco enterprise designer reviews the following scenario: A remote OSPF area must import a limited external route locally but should not flood all backbone external LSAs inward. Which action MOST DIRECTLY meets the stated design requirement?

  1. Use a properly designed not-so-stubby area and validate Type 7 translation at its ABR.
  2. Redesign area boundaries so ordinary interarea connectivity traverses the OSPF backbone.
  3. Summarize contiguous routes at eligible OSPF area boundaries without masking unavailable destinations.
  4. Evaluate a stub-area design with all routers in the area using compatible area type.

Explanation

Correct Answer

A:

Use a properly designed not-so-stubby area and validate Type 7 translation at its ABR. This action addresses the stated design problem. An OSPF NSSA can originate Type 7 external information and translate it at an eligible ABR. A practical confirmation is: The local redistributed prefix appears via the correct NSSA translation behavior and prohibited external floods remain absent.

Incorrect Answers

B:

OSPF’s normal multiarea hierarchy uses Area 0 as the backbone connecting other areas. The actual fault is governed by a different mechanism: an OSPF NSSA can originate Type 7 external information and translate it at an eligible ABR. The needed response is: Use a properly designed not-so-stubby area and validate Type 7 translation at its ABR.

C:

An OSPF ABR can aggregate interarea prefixes, reducing route detail exported to other areas. The actual fault is governed by a different mechanism: an OSPF NSSA can originate Type 7 external information and translate it at an eligible ABR. The needed response is: Use a properly designed not-so-stubby area and validate Type 7 translation at its ABR.

D:

An OSPF stub area restricts external Type 5 LSA flooding while permitting interarea reachability as designed. The actual fault is governed by a different mechanism: an OSPF NSSA can originate Type 7 external information and translate it at an eligible ABR. The needed response is: Use a properly designed not-so-stubby area and validate Type 7 translation at its ABR.

Question 146

The network architecture board discusses the following: A remote OSPF area must import a limited external route locally but should not flood all backbone external LSAs inward. Which technical principle BEST explains the design decision?

  1. An OSPF ABR can aggregate interarea prefixes, reducing route detail exported to other areas.
  2. An OSPF NSSA can originate Type 7 external information and translate it at an eligible ABR.
  3. An OSPF stub area restricts external Type 5 LSA flooding while permitting interarea reachability as designed.
  4. BGP local preference is used within an AS to prefer an outbound path, with higher values preferred.

Explanation

Correct Answer

B:

An OSPF NSSA can originate Type 7 external information and translate it at an eligible ABR. The correct engineering response is: Use a properly designed not-so-stubby area and validate Type 7 translation at its ABR. The observable check is: The local redistributed prefix appears via the correct NSSA translation behavior and prohibited external floods remain absent.

Incorrect Answers

A:

An OSPF NSSA can originate Type 7 external information and translate it at an eligible ABR. The offered choice instead concerns a different principle: an OSPF ABR can aggregate interarea prefixes, reducing route detail exported to other areas. Those technical conditions are not interchangeable.

C:

An OSPF NSSA can originate Type 7 external information and translate it at an eligible ABR. The offered choice instead concerns a different principle: an OSPF stub area restricts external Type 5 LSA flooding while permitting interarea reachability as designed. Those technical conditions are not interchangeable.

D:

An OSPF NSSA can originate Type 7 external information and translate it at an eligible ABR. The offered choice instead concerns a different principle: BGP local preference is used within an AS to prefer an outbound path, with higher values preferred. Those technical conditions are not interchangeable.

Question 147

The infrastructure team must validate this situation: A remote OSPF area must import a limited external route locally but should not flood all backbone external LSAs inward. Which acceptance observation BEST establishes the intended result?

  1. The area has no Type 5 external LSAs and still learns expected interarea routes or default access.
  2. Transit neighbors reach Full state while access interfaces show no unsolicited OSPF adjacencies.
  3. The local redistributed prefix appears via the correct NSSA translation behavior and prohibited external floods remain absent.
  4. The receiving area learns appropriate aggregates and retains working reachability to included component prefixes.

Explanation

Correct Answer

C:

The local redistributed prefix appears via the correct NSSA translation behavior and prohibited external floods remain absent. An OSPF NSSA can originate Type 7 external information and translate it at an eligible ABR.

Incorrect Answers

A:

An OSPF stub area restricts external Type 5 LSA flooding while permitting interarea reachability as designed. In the case being tested, an OSPF NSSA can originate Type 7 external information and translate it at an eligible ABR. The necessary acceptance evidence is: The local redistributed prefix appears via the correct NSSA translation behavior and prohibited external floods remain absent.

B:

Passive OSPF interfaces advertise their connected networks without forming unnecessary neighbor adjacencies. In the case being tested, an OSPF NSSA can originate Type 7 external information and translate it at an eligible ABR. The necessary acceptance evidence is: The local redistributed prefix appears via the correct NSSA translation behavior and prohibited external floods remain absent.

D:

An OSPF ABR can aggregate interarea prefixes, reducing route detail exported to other areas. In the case being tested, an OSPF NSSA can originate Type 7 external information and translate it at an eligible ABR. The necessary acceptance evidence is: The local redistributed prefix appears via the correct NSSA translation behavior and prohibited external floods remain absent.

Question 148

A post-incident design review discusses the following: A remote OSPF area must import a limited external route locally but should not flood all backbone external LSAs inward. Which preventive design control MOST DIRECTLY addresses this specific risk?

  1. Allocate prefixes by area and test summary behavior during partial site outages.
  2. Use interface role templates and audit router-facing versus user-facing ports.
  3. Document the stub-area boundary and check router area-type consistency.
  4. Review NSSA translator redundancy and route-leak policy before rollout.

Explanation

Correct Answer

D:

Review NSSA translator redundancy and route-leak policy before rollout. This control targets the underlying design risk. An OSPF NSSA can originate Type 7 external information and translate it at an eligible ABR. The follow-up acceptance check remains: The local redistributed prefix appears via the correct NSSA translation behavior and prohibited external floods remain absent.

Incorrect Answers

A:

An OSPF ABR can aggregate interarea prefixes, reducing route detail exported to other areas. The repeat risk here is different: an OSPF NSSA can originate Type 7 external information and translate it at an eligible ABR. A directly relevant preventive control is: Review NSSA translator redundancy and route-leak policy before rollout.

B:

Passive OSPF interfaces advertise their connected networks without forming unnecessary neighbor adjacencies. The repeat risk here is different: an OSPF NSSA can originate Type 7 external information and translate it at an eligible ABR. A directly relevant preventive control is: Review NSSA translator redundancy and route-leak policy before rollout.

C:

An OSPF stub area restricts external Type 5 LSA flooding while permitting interarea reachability as designed. The repeat risk here is different: an OSPF NSSA can originate Type 7 external information and translate it at an eligible ABR. A directly relevant preventive control is: Review NSSA translator redundancy and route-leak policy before rollout.

Question 149

During a network design workshop, the team finds this issue: During a predeployment review for a multisite healthcare network, the team discovers this design gap: a remote OSPF area must import a limited external route locally but should not flood all backbone external LSAs inward. An approval gate requires both a measurable acceptance check and a durable prevention control. Which action MOST DIRECTLY meets the stated design requirement?

  1. Redesign area boundaries so ordinary interarea connectivity traverses the OSPF backbone.
  2. Use a properly designed not-so-stubby area and validate Type 7 translation at its ABR.
  3. Evaluate a stub-area design with all routers in the area using compatible area type.
  4. Narrow the summary or correct allocation so the aggregate represents reachable subordinate networks.

Explanation

Correct Answer

B:

Use a properly designed not-so-stubby area and validate Type 7 translation at its ABR. This action addresses the stated design problem. An OSPF NSSA can originate Type 7 external information and translate it at an eligible ABR. A practical confirmation is: The local redistributed prefix appears via the correct NSSA translation behavior and prohibited external floods remain absent. The multisite healthcare network acceptance record also captures this result.

Incorrect Answers

A:

OSPF’s normal multiarea hierarchy uses Area 0 as the backbone connecting other areas. The actual fault is governed by a different mechanism: an OSPF NSSA can originate Type 7 external information and translate it at an eligible ABR. The needed response is: Use a properly designed not-so-stubby area and validate Type 7 translation at its ABR.

C:

An OSPF stub area restricts external Type 5 LSA flooding while permitting interarea reachability as designed. The actual fault is governed by a different mechanism: an OSPF NSSA can originate Type 7 external information and translate it at an eligible ABR. The needed response is: Use a properly designed not-so-stubby area and validate Type 7 translation at its ABR.

D:

EIGRP summarization can hide detailed routes; an overbroad aggregate may attract traffic to nonexistent destinations. The actual fault is governed by a different mechanism: an OSPF NSSA can originate Type 7 external information and translate it at an eligible ABR. The needed response is: Use a properly designed not-so-stubby area and validate Type 7 translation at its ABR.

Question 150

In a technical design review: During a predeployment review for a multisite healthcare network, the team discovers this design gap: a remote OSPF area must import a limited external route locally but should not flood all backbone external LSAs inward. An approval gate requires both a measurable acceptance check and a durable prevention control. Which technical principle BEST explains the design decision?

  1. An OSPF stub area restricts external Type 5 LSA flooding while permitting interarea reachability as designed.
  2. Passive OSPF interfaces advertise their connected networks without forming unnecessary neighbor adjacencies.
  3. An OSPF NSSA can originate Type 7 external information and translate it at an eligible ABR.
  4. Routing protocol authentication helps prevent unauthenticated devices from injecting link-state information.

Explanation

Correct Answer

C:

An OSPF NSSA can originate Type 7 external information and translate it at an eligible ABR. The correct engineering response is: Use a properly designed not-so-stubby area and validate Type 7 translation at its ABR. The observable check is: The local redistributed prefix appears via the correct NSSA translation behavior and prohibited external floods remain absent. The multisite healthcare network acceptance record also captures this result.

Incorrect Answers

A:

An OSPF NSSA can originate Type 7 external information and translate it at an eligible ABR. The offered choice instead concerns a different principle: an OSPF stub area restricts external Type 5 LSA flooding while permitting interarea reachability as designed. Those technical conditions are not interchangeable.

B:

An OSPF NSSA can originate Type 7 external information and translate it at an eligible ABR. The offered choice instead concerns a different principle: Passive OSPF interfaces advertise their connected networks without forming unnecessary neighbor adjacencies. Those technical conditions are not interchangeable.

D:

An OSPF NSSA can originate Type 7 external information and translate it at an eligible ABR. The offered choice instead concerns a different principle: Routing protocol authentication helps prevent unauthenticated devices from injecting link-state information. Those technical conditions are not interchangeable.