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300-420 Cisco Designing Cisco Enterprise Networks (ENSLD) Free Practice Exam Questions (2025 Updated)

Prepare effectively for your Cisco 300-420 Designing Cisco Enterprise Networks (ENSLD) certification with our extensive collection of free, high-quality practice questions. Each question is designed to mirror the actual exam format and objectives, complete with comprehensive answers and detailed explanations. Our materials are regularly updated for 2025, ensuring you have the most current resources to build confidence and succeed on your first attempt.

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Total 339 questions

Refer to the exhibit. The distribution switches serve as the layer 3 boundary. HSRP preemption is enabled. When the primary switch comes back after a failure, traffic is initially dropped. Which solution must be implemented to improve the design?

A.

Increase the hello timers on both HSRP devices

B.

Use the preempt delay feature on the primary HSRP device.

C.

Use the preempt delay feature on the backup HSRP device

D.

Configure a higher mac-refresh interval on both HSRP devices

A network architect Is enabling TV services In the LAN. The source will be streaming to the 239.1.1.1 group IP address. Dense mode Is not allowed In the network. Multicast has already been enabled on all network devices In the LAN segment. Which action must the architect take to finalize the design?

A.

Enable PIM SSM.

B.

Enable PIM Auto-RP.

C.

Enable PIM Anycast RP

D.

Enable PIM BSR.

Drag and drop the elements from the left onto the YANG models where they and used on the right.

What are two benefits of designing an SD-WAN network fabric with direct Internet access implemented at

every site? (Choose two.)

A.

It decreases latency to applications hosted by public cloud service provider.

B.

It decreases latency on Internet circuits.

C.

It increases the speed of delivery of site deployments through zero-touch provisioning.

D.

It increases the total available bandwidth on Internet circuits.

E.

It alleviates network traffic on MPLS circuits.

Refer to the exhibit. An architect must design a solution to connect the two ASs. To optimize bandwidth, the design will implement load sharing between router R6 and router R4. Which solution should the design include?

A.

Use update-source to specify the Loopback interface.

B.

Use next-hop-serf attributes only for routes that are learned from eBGP peers.

C.

Configure the eBGP TTL to support eBGP multihop.

D.

Use maximum-paths to install multiple paths in the routing table.

What is the purpose of the fabric management plane in a Cisco SD-Access architecture?

A.

create LISP-based EID for the end-to-end solution that is offered by SD-Access

B.

enable EID-to-RLOC mapping that is based on the BGP protocol

C.

create an underlay network that is based on the IS-IS routing protocol

D.

enable automation techniques for device deployments and configurations

Refer to the exhibit.

The failover time of ISP-2 is significantly shorter than ISP-1 when an interface on the ISP router toward the campus network fails. Which solution minimizes the downtime to the sub-second?

A.

Aggressive timers

B.

Next-hop address tracking

C.

Graceful-restart

D.

BFD

Refer to the exhibit. Which method must an architect use to provide connectivity between the mail servers?

A.

ISATAP

B.

6to4

C.

IPv4 compaliDie

D.

6rd

Refer to the exhibit. An architect reviews the low-level design of a company's enterprise network and advises optimizing the STP convergence time. Which functionality must be to Gi1/0/1-10 to follow the architect's recommendation?

A.

PortFast

B.

root guard

C.

UplinkFast

D.

BPDU guard

Refer to the exhibit. Which process does the Ethernet LMI protocol follow that is defined by the MEF 16 Technical Specification?

A.

communicates ENI and EVC attributes to the CE

B.

notifies the CE of the availability state of a configured EVC

C.

broadcasts multicast network routes from the CE to the PE

D.

broadcasts to all subnets from the CE when an EVC is added

An engineer is designing a BGP solution supporting a VXLAN environment over a Layer 3 IPv4 network fabric with these requirements

    provide Layer 2 adjacency

    allow VM migration of workloads between sites

    IGP is OSPF

Which BGP address family must the engineer choose?

A.

VPNv4

B.

IPv4 unicast

C.

L2VPN VPLS-VPWS

D.

L2VPNEVPN

Company A recently acquired another company. Users of the newly acquired company must be able to access a server that exists on Company A’s network, both companies use overlapping IP address ranges. Which action conserves IP address space and provides access to the server?

A.

Use a single IP address to create overload NAT

B.

Use a single IP address to create a static NAT entry

C.

Build one-to-one NAT translation for every user that needs access

D.

Re-IP overlapping address space in the acquired company

Refer to the exhibit. An architect must design a solution to connect the network behind R3 with the EIGRP network. Which mechanism should be included to avoid routing loops?

A.

split-horizon

B.

summarization

C.

down bit

D.

route tags

How does a model-driven telemetry dial-out approach function?

A.

The device initiates a session to the collector based on the subscription.

B.

The collector initiates a session to the device and subscribes to data to be streamed.

C.

The collector Initiates a session to the device and gets the data of a previously defined subscription.

D.

The device initiates a session to the collector and negotiates a subscription.

Which two functions is the Cisco SD-Access Edge Node responsible for? (Choose two.)

A.

Act as anycast layer 3 gateway

B.

Advertise EID subnets

C.

Map users to virtual network

D.

Act as LISP proxy tunnel router

E.

Route and transport IP traffic

An engineer is designing a PIM Anycast RP solution between two data centers. The design must ensure that RP1 in DC1 and RP2 in DC2 inform each other about specific sources that have joined locally. Which solution must the engineer choose?

A.

Provision the RPs on the same IP subnet and extend the subnet at Layer 2 between data centers

B.

Enable MSDP between RPs using separate unique loopback interfaces

C.

Enable MSDP between RPs using the configured Anycast RP address

D.

No action is required because PIM registers from the source will, by default, reach each RP

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?

A.

    Verify the GRE tunnels.

B.

    Verify ISAKMP.

C.

    Verify NHRP.

D.

    Verify crypto maps.

Refer to the exhibit. An architect with an employee ID: 4542:60:170 is designing a campus Layer 2 infrastructure. The design requires a PoE power budget that varies from 30-60 W. In addition, power must be provided continuously to some endpoints and must be supported even during the reloading of edge switches. Which solution must the architect select?

A.

PoE Plus

B.

Fast PoE

C.

Universal PoE

D.

Perpetual PoE

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?

A.

802.1Q connectivity on the LAN side of the CE

B.

route exchange with the service provider

C.

address translation to hide overlapping subnets

D.

different VLANs on each site

Which WAN connectivity technology is optimal for edge computing compared to others and why?

A.

Due to low latency, high bandwidth, and closest proximity to the user. 4G/5G connectivity is the optimal WAN technology for edge computing compared to L3 VPN MPLS connectivity, which offers native separation and security with close proximity to the data center.

B.

Due to high bandwidth, separation and security, and proximity to the data center network. DWDM Is the optimal WAN technology lor edge computing compared to 4G/5G connectivity, which offers native separation and security with close proximity to the data center.

C.

Due to low latency, high bandwidth, and closest proximity to the user, L3 VPN MPLS connectivity is the optimal WAN technology for edge computing compared to 4G/5G connectivity, which offers native separation and security with close proximity to the data center.

D.

Due to low cost, high bandwidth, low latency, and closest proximity to the edge of the network, Mero Ethernet is the optimal WAN technology for edge computing compared to MPLS, which offers native separation and security with close proximity to the data center.

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