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 5

Question 40

The change advisory board sees a repeat risk in this case: During a predeployment review for a manufacturing regional hub, the team discovers this design gap: two subsidiaries independently choose the same RFC 1918 prefixes and a merger creates ambiguous VPN routing. 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. Check for overlapping prefixes during acquisitions and maintain authoritative IP address inventories. Apply the same control to the manufacturing regional hub rollout checklist.
  2. Maintain an address management registry and enforce aggregate boundaries during branch allocations.
  3. Reserve hierarchy by region and use automated checks to prevent overlapping IPv6 prefixes.
  4. Document platform support for /31 and standardize point-to-point allocations in IPAM.

Explanation

Correct Answer

A:

Check for overlapping prefixes during acquisitions and maintain authoritative IP address inventories. Apply the same control to the manufacturing regional hub rollout checklist. This control targets the underlying design risk. Overlapping private address space prevents unambiguous ordinary IP routing between identical prefixes. The follow-up acceptance check remains: Traffic to both formerly overlapping destinations follows the intended routes after renumbering or a documented translation boundary. The manufacturing regional hub acceptance record also captures this result.

Incorrect Answers

B:

Contiguous nonoverlapping prefixes can be summarized at a network boundary, reducing routing-table complexity. The repeat risk here is different: Overlapping private address space prevents unambiguous ordinary IP routing between identical prefixes. A directly relevant preventive control is: Check for overlapping prefixes during acquisitions and maintain authoritative IP address inventories. Apply the same control to the manufacturing regional hub rollout checklist.

C:

IPv6 LAN autoconfiguration normally relies on a /64 subnet; a /48 supports many distinct /64 subnets. The repeat risk here is different: Overlapping private address space prevents unambiguous ordinary IP routing between identical prefixes. A directly relevant preventive control is: Check for overlapping prefixes during acquisitions and maintain authoritative IP address inventories. Apply the same control to the manufacturing regional hub rollout checklist.

D:

RFC 3021 /31s can use both addresses on point-to-point links without ordinary network and broadcast host reservations. The repeat risk here is different: Overlapping private address space prevents unambiguous ordinary IP routing between identical prefixes. A directly relevant preventive control is: Check for overlapping prefixes during acquisitions and maintain authoritative IP address inventories. Apply the same control to the manufacturing regional hub rollout checklist.

Question 41

A design team must resolve this enterprise network problem: A campus allocates a /48 IPv6 prefix to a single access VLAN and cannot identify locations by prefix hierarchy. Which action MOST DIRECTLY meets the stated design requirement?

  1. Allocate at least a /25 for the present host count and separately reserve adjacent space for growth.
  2. Use suitable /31 IPv4 addressing on compatible point-to-point links rather than a /24 on each link.
  3. Use a structured site and VLAN hierarchy with separate /64 segments within the organization’s larger allocation.
  4. Set higher BGP local preference for the desired exit within the local AS.

Explanation

Correct Answer

C:

Use a structured site and VLAN hierarchy with separate /64 segments within the organization’s larger allocation. This action addresses the stated design problem. Hierarchical IPv6 prefix planning supports route summarization and stable per-link /64 subnets. A practical confirmation is: Routing aggregates match assigned site boundaries and no two VLANs share a unicast prefix.

Incorrect Answers

A:

A /26 offers 62 usable conventional host addresses; a /25 offers 126, so /26 cannot accommodate 108 endpoints. The actual fault is governed by a different mechanism: Hierarchical IPv6 prefix planning supports route summarization and stable per-link /64 subnets. The needed response is: Use a structured site and VLAN hierarchy with separate /64 segments within the organization’s larger allocation.

B:

RFC 3021 /31s can use both addresses on point-to-point links without ordinary network and broadcast host reservations. The actual fault is governed by a different mechanism: Hierarchical IPv6 prefix planning supports route summarization and stable per-link /64 subnets. The needed response is: Use a structured site and VLAN hierarchy with separate /64 segments within the organization’s larger allocation.

D:

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: Hierarchical IPv6 prefix planning supports route summarization and stable per-link /64 subnets. The needed response is: Use a structured site and VLAN hierarchy with separate /64 segments within the organization’s larger allocation.

Question 42

The design record describes this issue: A campus allocates a /48 IPv6 prefix to a single access VLAN and cannot identify locations by prefix hierarchy. Which technical principle BEST explains the design decision?

  1. IPv6 LAN autoconfiguration normally relies on a /64 subnet; a /48 supports many distinct /64 subnets.
  2. Overlapping private address space prevents unambiguous ordinary IP routing between identical prefixes.
  3. OSPF’s normal multiarea hierarchy uses Area 0 as the backbone connecting other areas.
  4. Hierarchical IPv6 prefix planning supports route summarization and stable per-link /64 subnets.

Explanation

Correct Answer

D:

Hierarchical IPv6 prefix planning supports route summarization and stable per-link /64 subnets. The correct engineering response is: Use a structured site and VLAN hierarchy with separate /64 segments within the organization’s larger allocation. The observable check is: Routing aggregates match assigned site boundaries and no two VLANs share a unicast prefix.

Incorrect Answers

A:

Hierarchical IPv6 prefix planning supports route summarization and stable per-link /64 subnets. The offered choice instead concerns a different principle: IPv6 LAN autoconfiguration normally relies on a /64 subnet; a /48 supports many distinct /64 subnets. Those technical conditions are not interchangeable.

B:

Hierarchical IPv6 prefix planning supports route summarization and stable per-link /64 subnets. The offered choice instead concerns a different principle: Overlapping private address space prevents unambiguous ordinary IP routing between identical prefixes. Those technical conditions are not interchangeable.

C:

Hierarchical IPv6 prefix planning supports route summarization and stable per-link /64 subnets. 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.

Question 43

After designing a change for the following scenario: A campus allocates a /48 IPv6 prefix to a single access VLAN and cannot identify locations by prefix hierarchy. Which acceptance observation BEST establishes the intended result?

  1. Routing aggregates match assigned site boundaries and no two VLANs share a unicast prefix.
  2. Traffic to both formerly overlapping destinations follows the intended routes after renumbering or a documented translation boundary.
  3. Each VLAN has a unique /64 and clients form valid IPv6 addresses with correct gateway reachability.
  4. The installed route shows eligible multiple next hops and traffic distribution stays within the link capacity plan.

Explanation

Correct Answer

A:

Routing aggregates match assigned site boundaries and no two VLANs share a unicast prefix. Hierarchical IPv6 prefix planning supports route summarization and stable per-link /64 subnets.

Incorrect Answers

B:

Overlapping private address space prevents unambiguous ordinary IP routing between identical prefixes. In the case being tested, Hierarchical IPv6 prefix planning supports route summarization and stable per-link /64 subnets. The necessary acceptance evidence is: Routing aggregates match assigned site boundaries and no two VLANs share a unicast prefix.

C:

IPv6 LAN autoconfiguration normally relies on a /64 subnet; a /48 supports many distinct /64 subnets. In the case being tested, Hierarchical IPv6 prefix planning supports route summarization and stable per-link /64 subnets. The necessary acceptance evidence is: Routing aggregates match assigned site boundaries and no two VLANs share a unicast prefix.

D:

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, Hierarchical IPv6 prefix planning supports route summarization and stable per-link /64 subnets. The necessary acceptance evidence is: Routing aggregates match assigned site boundaries and no two VLANs share a unicast prefix.

Question 44

A preventive architecture review covers this situation: A campus allocates a /48 IPv6 prefix to a single access VLAN and cannot identify locations by prefix hierarchy. Which preventive design control MOST DIRECTLY addresses this specific risk?

  1. Maintain an address management registry and enforce aggregate boundaries during branch allocations.
  2. Publish a site-level IPv6 addressing plan and review allocations before turn-up.
  3. Check for overlapping prefixes during acquisitions and maintain authoritative IP address inventories.
  4. Document platform support for /31 and standardize point-to-point allocations in IPAM.

Explanation

Correct Answer

B:

Publish a site-level IPv6 addressing plan and review allocations before turn-up. This control targets the underlying design risk. Hierarchical IPv6 prefix planning supports route summarization and stable per-link /64 subnets. The follow-up acceptance check remains: Routing aggregates match assigned site boundaries and no two VLANs share a unicast prefix.

Incorrect Answers

A:

Contiguous nonoverlapping prefixes can be summarized at a network boundary, reducing routing-table complexity. The repeat risk here is different: Hierarchical IPv6 prefix planning supports route summarization and stable per-link /64 subnets. A directly relevant preventive control is: Publish a site-level IPv6 addressing plan and review allocations before turn-up.

C:

Overlapping private address space prevents unambiguous ordinary IP routing between identical prefixes. The repeat risk here is different: Hierarchical IPv6 prefix planning supports route summarization and stable per-link /64 subnets. A directly relevant preventive control is: Publish a site-level IPv6 addressing plan and review allocations before turn-up.

D:

RFC 3021 /31s can use both addresses on point-to-point links without ordinary network and broadcast host reservations. The repeat risk here is different: Hierarchical IPv6 prefix planning supports route summarization and stable per-link /64 subnets. A directly relevant preventive control is: Publish a site-level IPv6 addressing plan and review allocations before turn-up.

Question 45

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 campus allocates a /48 IPv6 prefix to a single access VLAN and cannot identify locations by prefix hierarchy. An approval gate requires both a measurable acceptance check and a durable prevention control. Which action MOST DIRECTLY meets the stated design requirement?

  1. Create a renumbering and conflict-remediation plan before joining the overlapping networks.
  2. Allocate at least a /25 for the present host count and separately reserve adjacent space for growth.
  3. Use suitable /31 IPv4 addressing on compatible point-to-point links rather than a /24 on each link.
  4. Use a structured site and VLAN hierarchy with separate /64 segments within the organization’s larger allocation.

Explanation

Correct Answer

D:

Use a structured site and VLAN hierarchy with separate /64 segments within the organization’s larger allocation. This action addresses the stated design problem. Hierarchical IPv6 prefix planning supports route summarization and stable per-link /64 subnets. A practical confirmation is: Routing aggregates match assigned site boundaries and no two VLANs share a unicast prefix. The financial services campus acceptance record also captures this result.

Incorrect Answers

A:

Overlapping private address space prevents unambiguous ordinary IP routing between identical prefixes. The actual fault is governed by a different mechanism: Hierarchical IPv6 prefix planning supports route summarization and stable per-link /64 subnets. The needed response is: Use a structured site and VLAN hierarchy with separate /64 segments within the organization’s larger allocation.

B:

A /26 offers 62 usable conventional host addresses; a /25 offers 126, so /26 cannot accommodate 108 endpoints. The actual fault is governed by a different mechanism: Hierarchical IPv6 prefix planning supports route summarization and stable per-link /64 subnets. The needed response is: Use a structured site and VLAN hierarchy with separate /64 segments within the organization’s larger allocation.

C:

RFC 3021 /31s can use both addresses on point-to-point links without ordinary network and broadcast host reservations. The actual fault is governed by a different mechanism: Hierarchical IPv6 prefix planning supports route summarization and stable per-link /64 subnets. The needed response is: Use a structured site and VLAN hierarchy with separate /64 segments within the organization’s larger allocation.

Question 46

For this Cisco ENSLD design case: During a predeployment review for a financial services campus, the team discovers this design gap: a campus allocates a /48 IPv6 prefix to a single access VLAN and cannot identify locations by prefix hierarchy. An approval gate requires both a measurable acceptance check and a durable prevention control. Which technical principle BEST explains the design decision?

  1. Hierarchical IPv6 prefix planning supports route summarization and stable per-link /64 subnets.
  2. A /26 offers 62 usable conventional host addresses; a /25 offers 126, so /26 cannot accommodate 108 endpoints.
  3. Contiguous nonoverlapping prefixes can be summarized at a network boundary, reducing routing-table complexity.
  4. IPv6 LAN autoconfiguration normally relies on a /64 subnet; a /48 supports many distinct /64 subnets.

Explanation

Correct Answer

A:

Hierarchical IPv6 prefix planning supports route summarization and stable per-link /64 subnets. The correct engineering response is: Use a structured site and VLAN hierarchy with separate /64 segments within the organization’s larger allocation. The observable check is: Routing aggregates match assigned site boundaries and no two VLANs share a unicast prefix. The financial services campus acceptance record also captures this result.

Incorrect Answers

B:

Hierarchical IPv6 prefix planning supports route summarization and stable per-link /64 subnets. The offered choice instead concerns a different principle: a /26 offers 62 usable conventional host addresses; a /25 offers 126, so /26 cannot accommodate 108 endpoints. Those technical conditions are not interchangeable.

C:

Hierarchical IPv6 prefix planning supports route summarization and stable per-link /64 subnets. The offered choice instead concerns a different principle: Contiguous nonoverlapping prefixes can be summarized at a network boundary, reducing routing-table complexity. Those technical conditions are not interchangeable.

D:

Hierarchical IPv6 prefix planning supports route summarization and stable per-link /64 subnets. The offered choice instead concerns a different principle: IPv6 LAN autoconfiguration normally relies on a /64 subnet; a /48 supports many distinct /64 subnets. Those technical conditions are not interchangeable.

Question 47

During acceptance testing for this network design: During a predeployment review for a financial services campus, the team discovers this design gap: a campus allocates a /48 IPv6 prefix to a single access VLAN and cannot identify locations by prefix hierarchy. An approval gate requires both a measurable acceptance check and a durable prevention control. Which acceptance observation BEST establishes the intended result?

  1. The approved subnet provides 126 usable addresses and 108 endpoints can obtain unique leases without overlapping other subnets.
  2. Routing aggregates match assigned site boundaries and no two VLANs share a unicast prefix. The financial services campus acceptance record also captures this result.
  3. Branch prefixes fall inside the advertised aggregate and reachability tests confirm no unintended addresses are drawn into the summary.
  4. Traffic to both formerly overlapping destinations follows the intended routes after renumbering or a documented translation boundary.

Explanation

Correct Answer

B:

Routing aggregates match assigned site boundaries and no two VLANs share a unicast prefix. The financial services campus acceptance record also captures this result. Hierarchical IPv6 prefix planning supports route summarization and stable per-link /64 subnets.

Incorrect Answers

A:

A /26 offers 62 usable conventional host addresses; a /25 offers 126, so /26 cannot accommodate 108 endpoints. In the case being tested, Hierarchical IPv6 prefix planning supports route summarization and stable per-link /64 subnets. The necessary acceptance evidence is: Routing aggregates match assigned site boundaries and no two VLANs share a unicast prefix. The financial services campus acceptance record also captures this result.

C:

Contiguous nonoverlapping prefixes can be summarized at a network boundary, reducing routing-table complexity. In the case being tested, Hierarchical IPv6 prefix planning supports route summarization and stable per-link /64 subnets. The necessary acceptance evidence is: Routing aggregates match assigned site boundaries and no two VLANs share a unicast prefix. The financial services campus acceptance record also captures this result.

D:

Overlapping private address space prevents unambiguous ordinary IP routing between identical prefixes. In the case being tested, Hierarchical IPv6 prefix planning supports route summarization and stable per-link /64 subnets. The necessary acceptance evidence is: Routing aggregates match assigned site boundaries and no two VLANs share a unicast prefix. The financial services campus acceptance record also captures this result.

Question 48

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 campus allocates a /48 IPv6 prefix to a single access VLAN and cannot identify locations by prefix hierarchy. 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 platform support for /31 and standardize point-to-point allocations in IPAM.
  2. Check for overlapping prefixes during acquisitions and maintain authoritative IP address inventories.
  3. Publish a site-level IPv6 addressing plan and review allocations before turn-up. Apply the same control to the financial services campus rollout checklist.
  4. Maintain an address management registry and enforce aggregate boundaries during branch allocations.

Explanation

Correct Answer

C:

Publish a site-level IPv6 addressing plan and review allocations before turn-up. Apply the same control to the financial services campus rollout checklist. This control targets the underlying design risk. Hierarchical IPv6 prefix planning supports route summarization and stable per-link /64 subnets. The follow-up acceptance check remains: Routing aggregates match assigned site boundaries and no two VLANs share a unicast prefix. The financial services campus acceptance record also captures this result.

Incorrect Answers

A:

RFC 3021 /31s can use both addresses on point-to-point links without ordinary network and broadcast host reservations. The repeat risk here is different: Hierarchical IPv6 prefix planning supports route summarization and stable per-link /64 subnets. A directly relevant preventive control is: Publish a site-level IPv6 addressing plan and review allocations before turn-up. Apply the same control to the financial services campus rollout checklist.

B:

Overlapping private address space prevents unambiguous ordinary IP routing between identical prefixes. The repeat risk here is different: Hierarchical IPv6 prefix planning supports route summarization and stable per-link /64 subnets. A directly relevant preventive control is: Publish a site-level IPv6 addressing plan and review allocations before turn-up. Apply the same control to the financial services campus rollout checklist.

D:

Contiguous nonoverlapping prefixes can be summarized at a network boundary, reducing routing-table complexity. The repeat risk here is different: Hierarchical IPv6 prefix planning supports route summarization and stable per-link /64 subnets. A directly relevant preventive control is: Publish a site-level IPv6 addressing plan and review allocations before turn-up. Apply the same control to the financial services campus rollout checklist.

Question 49

A Cisco enterprise designer reviews the following scenario: An IS-IS campus has access routers that need only local area routes but their LSDBs grow with all enterprise topology changes. Which action MOST DIRECTLY meets the stated design requirement?

  1. Keep access routers in Level 1 and use appropriate Level 1-2 routers for interarea connectivity.
  2. Use deliberate IS-IS metrics aligned to both directions of the design and verify bidirectional reachability.
  3. Use an appropriate IS-IS overload-bit maintenance procedure before removing the router from transit service.
  4. Enable supported IS-IS adjacency authentication and restrict the physical or logical peer surface.

Explanation

Correct Answer

A:

Keep access routers in Level 1 and use appropriate Level 1-2 routers for interarea connectivity. This action addresses the stated design problem. IS-IS Level 1 routers maintain area topology while Level 2 provides the interarea backbone. A practical confirmation is: Access routers retain area-local link-state information and still reach remote areas via the L1/L2 boundary.

Incorrect Answers

B:

IS-IS shortest-path selection is based on configured link-state costs, which may differ by direction. The actual fault is governed by a different mechanism: IS-IS Level 1 routers maintain area topology while Level 2 provides the interarea backbone. The needed response is: Keep access routers in Level 1 and use appropriate Level 1-2 routers for interarea connectivity.

C:

The IS-IS overload bit discourages other routers from selecting the device as intermediate transit when a valid alternative exists. The actual fault is governed by a different mechanism: IS-IS Level 1 routers maintain area topology while Level 2 provides the interarea backbone. The needed response is: Keep access routers in Level 1 and use appropriate Level 1-2 routers for interarea connectivity.

D:

Routing protocol authentication helps prevent unauthenticated devices from injecting link-state information. The actual fault is governed by a different mechanism: IS-IS Level 1 routers maintain area topology while Level 2 provides the interarea backbone. The needed response is: Keep access routers in Level 1 and use appropriate Level 1-2 routers for interarea connectivity.

Question 50

The network architecture board discusses the following: An IS-IS campus has access routers that need only local area routes but their LSDBs grow with all enterprise topology changes. Which technical principle BEST explains the design decision?

  1. Routing protocol authentication helps prevent unauthenticated devices from injecting link-state information.
  2. IS-IS Level 1 routers maintain area topology while Level 2 provides the interarea backbone.
  3. IS-IS shortest-path selection is based on configured link-state costs, which may differ by direction.
  4. The IS-IS overload bit discourages other routers from selecting the device as intermediate transit when a valid alternative exists.

Explanation

Correct Answer

B:

IS-IS Level 1 routers maintain area topology while Level 2 provides the interarea backbone. The correct engineering response is: Keep access routers in Level 1 and use appropriate Level 1-2 routers for interarea connectivity. The observable check is: Access routers retain area-local link-state information and still reach remote areas via the L1/L2 boundary.

Incorrect Answers

A:

IS-IS Level 1 routers maintain area topology while Level 2 provides the interarea backbone. 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.

C:

IS-IS Level 1 routers maintain area topology while Level 2 provides the interarea backbone. The offered choice instead concerns a different principle: IS-IS shortest-path selection is based on configured link-state costs, which may differ by direction. Those technical conditions are not interchangeable.

D:

IS-IS Level 1 routers maintain area topology while Level 2 provides the interarea backbone. The offered choice instead concerns a different principle: the IS-IS overload bit discourages other routers from selecting the device as intermediate transit when a valid alternative exists. Those technical conditions are not interchangeable.