Cisco 300-420 practice materials Questions Answers

Exam Code:
300-420
Exam Name:
Designing Cisco Enterprise Networks (300-420 ENSLD) Exam
Last Update:
Jun 01,2026

339 Questions Answers Verified by Experts!


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Page: 1 / 49
Total Questions: 242

Questions & Answers PDF

• Question 1

  

  In an SD-WAN architecture, which methods are used to bootstrap a vEdge router?

  • DHCP options or manual configuration
  • vManage or DNS records
  • ZTP or manual configuration
  • DNS records or DHCP options

  Reveal Answer Answer: C Next Question

• Question 2

  

  An engineer must design a large Layer 2 domain that contains hundreds of switches and VLANs. The engineer's primary goals are to:*Efficiently utilize the bandwidth of all links*Avoid Layer 2 loops*Cause minimal impact on switch CPU and memoryWhich technology should the engineer include in the design?

  • PVST+
  • Rapid PVST+
  • MST
  • RSTP

  Reveal Answer Answer: C Next Question

• Question 3

  

  A network engineer must segregate three interconnected campus networks using IS-IS routing. A two-layer hierarchy must be used to support large routing domains and to avoid more specific routes from each campus network being advertised to other campus network routers automatically. Which two actions does the engineer take to accomplish this segregation? (Choose two.)

  • Designate two IS-IS routers as BDR routers at the edge of each campus, and configure one BDR for all Level 1 routers and one BDR for all Level 2 routers.
  • Designate two IS-IS routers from each campus to act as Level 1/Level 2 backbone routers at the edge of each campus network.
  • Assign the same IS-IS NET value for each campus, and configure internal campus routers with Level 1/ Level 2 routing.
  • Utilize different MTU values for each campus network segment. Level 2 backbone routers must utilize a larger MTU size of 9216.
  • Assign a unique IS-IS NET value for each campus, and configure internal campus routers with Level 1 routing.

  Reveal Answer Answer: B, E Next Question

• Question 4

  

  Which design achieves SD-WAN control plane redundancy?

  • Configuring BFD on the WAN Edge routers
  • Using multiple instances of vManage in clusters
  • Deploying using a virtual platform like UCS or CSP
  • Managing the underlay network with OMP

  Reveal Answer Answer: B Next Question

• Question 5

  

  A customer with an IPv4 only network topology wants to enable IPv6 connectivity while preserving the IPv4 topology services. The customer plans to migrate IPv4 services to the IPv6 topology, then decommission the IPv4 topology. Which topology supports these requirements?

  • dual stack
  • 6VPE
  • 6to4
  • NAT64

  Reveal Answer Answer: A Next Question

• Question 6

  

  An architect must create a QoS solution for a customer to ensure that a 40 Mbps Internet connection is shared between four subnets based on these requirements:* Each subnet must receive no less than 10 Mbps of download bandwidth during peak traffic times.* A subnet can use up to 40 Mbps during nonpeak traffic times if the other subnets are idle.* Download traffic must never experience a delay.Which solution must the architect choose?

  • rate-limiting and shaping
  • bandwidth percentage and policing
  • shaping and policing
  • bandwidth percentage and rate-limiting

  Reveal Answer Answer: B Next Question

• Question 7

  

  What are two benefits of designing an SD-WAN network fabric with direct Internet access implemented atevery site? (Choose two.)

  • It decreases latency to applications hosted by public cloud service provider.
  • It decreases latency on Internet circuits.
  • It increases the speed of delivery of site deployments through zero-touch provisioning.
  • It increases the total available bandwidth on Internet circuits.
  • It alleviates network traffic on MPLS circuits.

  Reveal Answer Answer: A, E Next Question

• Question 8

  

  A network administrator is troubleshooting a DMVPN setup between the hub and the spoke. Which action should the administrator take before troubleshooting the IPsec configuration?

  • Verify the GRE tunnels.
  • Verify ISAKMP.
  • Verify NHRP.
  • Verify crypto maps.

  Reveal Answer Answer: A Next Question

• Question 9

  

  Refer to the exhibit. An architect must create a stable and scalable EIGRP solution for a customer. The design must:*conserve bandwidth, memory, and CPU processing*prevent suboptimal routing*avoid any unnecessary queriesWhich two solutions must the architect select? (Choose two.)

  • route summarization
  • prefix lists
  • distribute lists
  • stub routing
  • static redistribution

  Reveal Answer Answer: A, D Next Question

• Question 10

  

  A customer requests a VPN solution to connect multiple sites with the company headquarters. All the sites use the same IP subnet. The engineer plans to use VPLS. Which solutions must the engineer include in the design?

  • 802.1Q connectivity on the LAN side of the CE
  • route exchange with the service provider
  • address translation to hide overlapping subnets
  • different VLANs on each site

  Reveal Answer Answer: A Next Question

Page: 1 / 49
Total Questions: 242

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