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 17

Question 160

Operations wants to avoid recurrence of this design flaw: During a predeployment review for a distributed retail network, the team discovers this design gap: an OSPF transit circuit flaps when two routers disagree about which side is authorized to join the routing process. 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. Document the stub-area boundary and check router area-type consistency.
  2. Allocate prefixes by area and test summary behavior during partial site outages.
  3. Use interface role templates and audit router-facing versus user-facing ports. Apply the same control to the distributed retail network rollout checklist.
  4. Review NSSA translator redundancy and route-leak policy before rollout.

Explanation

Correct Answer

C:

Use interface role templates and audit router-facing versus user-facing ports. Apply the same control to the distributed retail network rollout checklist. This control targets the underlying design risk. Passive OSPF interfaces advertise their connected networks without forming unnecessary neighbor adjacencies. The follow-up acceptance check remains: Transit neighbors reach Full state while access interfaces show no unsolicited OSPF adjacencies. The distributed retail network acceptance record also captures this result.

Incorrect Answers

A:

An OSPF stub area restricts external Type 5 LSA flooding while permitting interarea reachability as designed. The repeat risk here is different: Passive OSPF interfaces advertise their connected networks without forming unnecessary neighbor adjacencies. A directly relevant preventive control is: Use interface role templates and audit router-facing versus user-facing ports. Apply the same control to the distributed retail network rollout checklist.

B:

An OSPF ABR can aggregate interarea prefixes, reducing route detail exported to other areas. The repeat risk here is different: Passive OSPF interfaces advertise their connected networks without forming unnecessary neighbor adjacencies. A directly relevant preventive control is: Use interface role templates and audit router-facing versus user-facing ports. Apply the same control to the distributed retail network 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: Passive OSPF interfaces advertise their connected networks without forming unnecessary neighbor adjacencies. A directly relevant preventive control is: Use interface role templates and audit router-facing versus user-facing ports. Apply the same control to the distributed retail network rollout checklist.

Question 161

A Cisco enterprise designer reviews the following scenario: Two eBGP exit links carry the same destination but the company wants traffic to prefer one exit AS-wide. Which action MOST DIRECTLY meets the stated design requirement?

  1. Set higher BGP local preference for the desired exit within the local AS.
  2. Ensure next-hop reachability through the IGP or apply next-hop-self at an appropriate border as designed.
  3. Consider controlled AS-path prepending on the less-preferred advertisement while acknowledging external policy can override it.
  4. Design a redundant BGP route-reflector topology and planned cluster/client relationships.

Explanation

Correct Answer

A:

Set higher BGP local preference for the desired exit within the local AS. This action addresses the stated design problem. BGP local preference is used within an AS to prefer an outbound path, with higher values preferred. A practical confirmation is: Routers across the AS select the intended exit for qualifying routes and fail over to the other when required.

Incorrect Answers

B:

BGP paths require a reachable next hop in the forwarding plane; distributing the prefix alone is not sufficient. The actual fault is governed by a different mechanism: BGP local preference is used within an AS to prefer an outbound path, with higher values preferred. The needed response is: Set higher BGP local preference for the desired exit within the local AS.

C:

AS-path length can influence outside-AS best-path selection but remote networks keep final policy authority. The actual fault is governed by a different mechanism: BGP local preference is used within an AS to prefer an outbound path, with higher values preferred. The needed response is: Set higher BGP local preference for the desired exit within the local AS.

D:

Route reflectors reduce the need for every iBGP speaker to peer with every other speaker, while preserving iBGP route propagation rules. The actual fault is governed by a different mechanism: BGP local preference is used within an AS to prefer an outbound path, with higher values preferred. The needed response is: Set higher BGP local preference for the desired exit within the local AS.

Question 162

The network architecture board discusses the following: Two eBGP exit links carry the same destination but the company wants traffic to prefer one exit AS-wide. Which technical principle BEST explains the design decision?

  1. BGP multipath requires compatible selected paths under the platform’s path-equivalence rules; mere coexistence of peers is not enough.
  2. BGP local preference is used within an AS to prefer an outbound path, with higher values preferred.
  3. Route reflectors reduce the need for every iBGP speaker to peer with every other speaker, while preserving iBGP route propagation rules.
  4. BGP paths require a reachable next hop in the forwarding plane; distributing the prefix alone is not sufficient.

Explanation

Correct Answer

B:

BGP local preference is used within an AS to prefer an outbound path, with higher values preferred. The correct engineering response is: Set higher BGP local preference for the desired exit within the local AS. The observable check is: Routers across the AS select the intended exit for qualifying routes and fail over to the other when required.

Incorrect Answers

A:

BGP local preference is used within an AS to prefer an outbound path, with higher values preferred. The offered choice instead concerns a different principle: BGP multipath requires compatible selected paths under the platform’s path-equivalence rules; mere coexistence of peers is not enough. Those technical conditions are not interchangeable.

C:

BGP local preference is used within an AS to prefer an outbound path, with higher values preferred. 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.

D:

BGP local preference is used within an AS to prefer an outbound path, with higher values preferred. The offered choice instead concerns a different principle: BGP paths require a reachable next hop in the forwarding plane; distributing the prefix alone is not sufficient. Those technical conditions are not interchangeable.

Question 163

The infrastructure team must validate this situation: Two eBGP exit links carry the same destination but the company wants traffic to prefer one exit AS-wide. Which acceptance observation BEST establishes the intended result?

  1. The installed route shows eligible multiple next hops and traffic distribution stays within the link capacity plan.
  2. Only approved partner prefixes are accepted and excess or private prefixes are rejected and logged.
  3. Routers across the AS select the intended exit for qualifying routes and fail over to the other when required.
  4. External route collectors and measured ingress traffic show whether the intended path preference is achieved.

Explanation

Correct Answer

C:

Routers across the AS select the intended exit for qualifying routes and fail over to the other when required. BGP local preference is used within an AS to prefer an outbound path, with higher values preferred.

Incorrect Answers

A:

BGP multipath requires compatible selected paths under the platform’s path-equivalence rules; mere coexistence of peers is not enough. In the case being tested, BGP local preference is used within an AS to prefer an outbound path, with higher values preferred. The necessary acceptance evidence is: Routers across the AS select the intended exit for qualifying routes and fail over to the other when required.

B:

Route policy can prevent undesired BGP NLRI from entering the local routing system. In the case being tested, BGP local preference is used within an AS to prefer an outbound path, with higher values preferred. The necessary acceptance evidence is: Routers across the AS select the intended exit for qualifying routes and fail over to the other when required.

D:

AS-path length can influence outside-AS best-path selection but remote networks keep final policy authority. In the case being tested, BGP local preference is used within an AS to prefer an outbound path, with higher values preferred. The necessary acceptance evidence is: Routers across the AS select the intended exit for qualifying routes and fail over to the other when required.

Question 164

A post-incident design review discusses the following: Two eBGP exit links carry the same destination but the company wants traffic to prefer one exit AS-wide. Which preventive design control MOST DIRECTLY addresses this specific risk?

  1. Track advertised AS paths and validate ingress behavior with both providers after changes.
  2. Maintain peer-specific prefix inventories and review BGP filters before provider changes.
  3. Test route-reflector redundancy and loop-prevention identifiers before scale-out.
  4. Document and audit local preference policy consistently at ingress border peers.

Explanation

Correct Answer

D:

Document and audit local preference policy consistently at ingress border peers. This control targets the underlying design risk. BGP local preference is used within an AS to prefer an outbound path, with higher values preferred. The follow-up acceptance check remains: Routers across the AS select the intended exit for qualifying routes and fail over to the other when required.

Incorrect Answers

A:

AS-path length can influence outside-AS best-path selection but remote networks keep final policy authority. The repeat risk here is different: BGP local preference is used within an AS to prefer an outbound path, with higher values preferred. A directly relevant preventive control is: Document and audit local preference policy consistently at ingress border peers.

B:

Route policy can prevent undesired BGP NLRI from entering the local routing system. The repeat risk here is different: BGP local preference is used within an AS to prefer an outbound path, with higher values preferred. A directly relevant preventive control is: Document and audit local preference policy consistently at ingress border peers.

C:

Route reflectors reduce the need for every iBGP speaker to peer with every other speaker, while preserving iBGP route propagation rules. The repeat risk here is different: BGP local preference is used within an AS to prefer an outbound path, with higher values preferred. A directly relevant preventive control is: Document and audit local preference policy consistently at ingress border peers.

Question 165

During a network design workshop, the team finds this issue: During a predeployment review for a university backbone, the team discovers this design gap: two eBGP exit links carry the same destination but the company wants traffic to prefer one exit AS-wide. An approval gate requires both a measurable acceptance check and a durable prevention control. Which action MOST DIRECTLY meets the stated design requirement?

  1. Verify BGP multipath eligibility and configure supported maximum-path behavior with consistent policy.
  2. Set higher BGP local preference for the desired exit within the local AS.
  3. Ensure next-hop reachability through the IGP or apply next-hop-self at an appropriate border as designed.
  4. Consider controlled AS-path prepending on the less-preferred advertisement while acknowledging external policy can override it.

Explanation

Correct Answer

B:

Set higher BGP local preference for the desired exit within the local AS. This action addresses the stated design problem. BGP local preference is used within an AS to prefer an outbound path, with higher values preferred. A practical confirmation is: Routers across the AS select the intended exit for qualifying routes and fail over to the other when required. The university backbone acceptance record also captures this result.

Incorrect Answers

A:

BGP multipath requires compatible selected paths under the platform’s path-equivalence rules; mere coexistence of peers is not enough. The actual fault is governed by a different mechanism: BGP local preference is used within an AS to prefer an outbound path, with higher values preferred. The needed response is: Set higher BGP local preference for the desired exit within the local AS.

C:

BGP paths require a reachable next hop in the forwarding plane; distributing the prefix alone is not sufficient. The actual fault is governed by a different mechanism: BGP local preference is used within an AS to prefer an outbound path, with higher values preferred. The needed response is: Set higher BGP local preference for the desired exit within the local AS.

D:

AS-path length can influence outside-AS best-path selection but remote networks keep final policy authority. The actual fault is governed by a different mechanism: BGP local preference is used within an AS to prefer an outbound path, with higher values preferred. The needed response is: Set higher BGP local preference for the desired exit within the local AS.

Question 166

In a technical design review: During a predeployment review for a university backbone, the team discovers this design gap: two eBGP exit links carry the same destination but the company wants traffic to prefer one exit AS-wide. An approval gate requires both a measurable acceptance check and a durable prevention control. Which technical principle BEST explains the design decision?

  1. AS-path length can influence outside-AS best-path selection but remote networks keep final policy authority.
  2. BGP multipath requires compatible selected paths under the platform’s path-equivalence rules; mere coexistence of peers is not enough.
  3. BGP local preference is used within an AS to prefer an outbound path, with higher values preferred.
  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

C:

BGP local preference is used within an AS to prefer an outbound path, with higher values preferred. The correct engineering response is: Set higher BGP local preference for the desired exit within the local AS. The observable check is: Routers across the AS select the intended exit for qualifying routes and fail over to the other when required. The university backbone acceptance record also captures this result.

Incorrect Answers

A:

BGP local preference is used within an AS to prefer an outbound path, with higher values preferred. The offered choice instead concerns a different principle: AS-path length can influence outside-AS best-path selection but remote networks keep final policy authority. Those technical conditions are not interchangeable.

B:

BGP local preference is used within an AS to prefer an outbound path, with higher values preferred. The offered choice instead concerns a different principle: BGP multipath requires compatible selected paths under the platform’s path-equivalence rules; mere coexistence of peers is not enough. Those technical conditions are not interchangeable.

D:

BGP local preference is used within an AS to prefer an outbound path, with higher values preferred. 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 167

An engineering reviewer needs objective proof for the following: During a predeployment review for a university backbone, the team discovers this design gap: two eBGP exit links carry the same destination but the company wants traffic to prefer one exit AS-wide. An approval gate requires both a measurable acceptance check and a durable prevention control. Which acceptance observation BEST establishes the intended result?

  1. Clients resolve the advertised BGP next hop and forward through the intended border router.
  2. The installed route shows eligible multiple next hops and traffic distribution stays within the link capacity plan.
  3. Clients receive intended reachable prefixes through both reflectors and reflector failure does not isolate the control plane.
  4. Routers across the AS select the intended exit for qualifying routes and fail over to the other when required. The university backbone acceptance record also captures this result.

Explanation

Correct Answer

D:

Routers across the AS select the intended exit for qualifying routes and fail over to the other when required. The university backbone acceptance record also captures this result. BGP local preference is used within an AS to prefer an outbound path, with higher values preferred.

Incorrect Answers

A:

BGP paths require a reachable next hop in the forwarding plane; distributing the prefix alone is not sufficient. In the case being tested, BGP local preference is used within an AS to prefer an outbound path, with higher values preferred. The necessary acceptance evidence is: Routers across the AS select the intended exit for qualifying routes and fail over to the other when required. The university backbone acceptance record also captures this result.

B:

BGP multipath requires compatible selected paths under the platform’s path-equivalence rules; mere coexistence of peers is not enough. In the case being tested, BGP local preference is used within an AS to prefer an outbound path, with higher values preferred. The necessary acceptance evidence is: Routers across the AS select the intended exit for qualifying routes and fail over to the other when required. The university backbone acceptance record also captures this result.

C:

Route reflectors reduce the need for every iBGP speaker to peer with every other speaker, while preserving iBGP route propagation rules. In the case being tested, BGP local preference is used within an AS to prefer an outbound path, with higher values preferred. The necessary acceptance evidence is: Routers across the AS select the intended exit for qualifying routes and fail over to the other when required. The university backbone acceptance record also captures this result.

Question 168

The change advisory board sees a repeat risk in this case: During a predeployment review for a university backbone, the team discovers this design gap: two eBGP exit links carry the same destination but the company wants traffic to prefer one exit AS-wide. 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. Document and audit local preference policy consistently at ingress border peers. Apply the same control to the university backbone rollout checklist.
  2. Validate multipath equivalence and hashing behavior during capacity tests.
  3. Include recursive next-hop resolution in the BGP acceptance checklist.
  4. Test route-reflector redundancy and loop-prevention identifiers before scale-out.

Explanation

Correct Answer

A:

Document and audit local preference policy consistently at ingress border peers. Apply the same control to the university backbone rollout checklist. This control targets the underlying design risk. BGP local preference is used within an AS to prefer an outbound path, with higher values preferred. The follow-up acceptance check remains: Routers across the AS select the intended exit for qualifying routes and fail over to the other when required. The university backbone acceptance record also captures this result.

Incorrect Answers

B:

BGP multipath requires compatible selected paths under the platform’s path-equivalence rules; mere coexistence of peers is not enough. The repeat risk here is different: BGP local preference is used within an AS to prefer an outbound path, with higher values preferred. A directly relevant preventive control is: Document and audit local preference policy consistently at ingress border peers. Apply the same control to the university backbone rollout checklist.

C:

BGP paths require a reachable next hop in the forwarding plane; distributing the prefix alone is not sufficient. The repeat risk here is different: BGP local preference is used within an AS to prefer an outbound path, with higher values preferred. A directly relevant preventive control is: Document and audit local preference policy consistently at ingress border peers. Apply the same control to the university backbone rollout checklist.

D:

Route reflectors reduce the need for every iBGP speaker to peer with every other speaker, while preserving iBGP route propagation rules. The repeat risk here is different: BGP local preference is used within an AS to prefer an outbound path, with higher values preferred. A directly relevant preventive control is: Document and audit local preference policy consistently at ingress border peers. Apply the same control to the university backbone rollout checklist.

Question 169

A design team must resolve this enterprise network problem: A company wants to influence which of its two ISP connections receives incoming traffic without depending on the ISP honoring MED. Which action MOST DIRECTLY meets the stated design requirement?

  1. Set higher BGP local preference for the desired exit within the local AS.
  2. Ensure next-hop reachability through the IGP or apply next-hop-self at an appropriate border as designed.
  3. Consider controlled AS-path prepending on the less-preferred advertisement while acknowledging external policy can override it.
  4. Apply explicit BGP inbound prefix filtering and route limits to the partner adjacency.

Explanation

Correct Answer

C:

Consider controlled AS-path prepending on the less-preferred advertisement while acknowledging external policy can override it. This action addresses the stated design problem. AS-path length can influence outside-AS best-path selection but remote networks keep final policy authority. A practical confirmation is: External route collectors and measured ingress traffic show whether the intended path preference is achieved.

Incorrect Answers

A:

BGP local preference is used within an AS to prefer an outbound path, with higher values preferred. The actual fault is governed by a different mechanism: AS-path length can influence outside-AS best-path selection but remote networks keep final policy authority. The needed response is: Consider controlled AS-path prepending on the less-preferred advertisement while acknowledging external policy can override it.

B:

BGP paths require a reachable next hop in the forwarding plane; distributing the prefix alone is not sufficient. The actual fault is governed by a different mechanism: AS-path length can influence outside-AS best-path selection but remote networks keep final policy authority. The needed response is: Consider controlled AS-path prepending on the less-preferred advertisement while acknowledging external policy can override it.

D:

Route policy can prevent undesired BGP NLRI from entering the local routing system. The actual fault is governed by a different mechanism: AS-path length can influence outside-AS best-path selection but remote networks keep final policy authority. The needed response is: Consider controlled AS-path prepending on the less-preferred advertisement while acknowledging external policy can override it.

Question 170

The design record describes this issue: A company wants to influence which of its two ISP connections receives incoming traffic without depending on the ISP honoring MED. Which technical principle BEST explains the design decision?

  1. Route reflectors reduce the need for every iBGP speaker to peer with every other speaker, while preserving iBGP route propagation rules.
  2. BGP multipath requires compatible selected paths under the platform’s path-equivalence rules; mere coexistence of peers is not enough.
  3. Route policy can prevent undesired BGP NLRI from entering the local routing system.
  4. AS-path length can influence outside-AS best-path selection but remote networks keep final policy authority.

Explanation

Correct Answer

D:

AS-path length can influence outside-AS best-path selection but remote networks keep final policy authority. The correct engineering response is: Consider controlled AS-path prepending on the less-preferred advertisement while acknowledging external policy can override it. The observable check is: External route collectors and measured ingress traffic show whether the intended path preference is achieved.

Incorrect Answers

A:

AS-path length can influence outside-AS best-path selection but remote networks keep final policy authority. 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.

B:

AS-path length can influence outside-AS best-path selection but remote networks keep final policy authority. The offered choice instead concerns a different principle: BGP multipath requires compatible selected paths under the platform’s path-equivalence rules; mere coexistence of peers is not enough. Those technical conditions are not interchangeable.

C:

AS-path length can influence outside-AS best-path selection but remote networks keep final policy authority. The offered choice instead concerns a different principle: Route policy can prevent undesired BGP NLRI from entering the local routing system. Those technical conditions are not interchangeable.