Free Cisco 300-420 ENSLD Practice Questions 2026 Part2

Question #1

An engineer is designing a QoS policy that queues excess packets for later transmission. Whichmechanism must be included in the design?

A. haping

B. RED

C. olicing

D. ED http://www

View answer

Correct Answer: A

Question #2

Refer to the exhibit.An engineer is designing a redistribution solution for a customer. The customer recently acquired another company and decided to Integrate the new network running RIPv1 with the company's existing network. Which redistribution technique must the engineer select to ensure the multipoint two-way redistribution does not cause routing loops?

A. distribute-lists inbound under the EIGRP process denying RIPv1 learned prefixes

B. distribute-lists inbound under the RIPv1 process denying EIGRP learned prefixes

C. distribute-lists outbound under the EIGRP process denying RIPv1 learned prefixes

D. distribute-lists outbound under the RIPv1 process denying EIGRP learned prefixes

View answer

Correct Answer: A

Question #3

Refer to the exhibits. An engineer is troubleshooting an issue in which the Gig0/2 interface on a Cisco switch named SW2 fails to become the root port. Which two commands must be run on SW2 to resolve this issue? (Choose two.)

A. SW2(config-if)# no spanning-tree cost 4

B. SW2(config)# interface Gig0/2

C. SW2(config-if)# spanning-tree cost 4

D. SW2(config)# interface Fa0/3

E. SW2(config-if)# spanning-tree cost 5

View answer

Correct Answer: BE

Question #4

Which feature must be incorporated into the campus LAN design to enable Wake on LAN?

A. dynamic ARP Inspection Snooping on layer 2 devices

B. directed broadcasts on layer 3 devices

C. proxy ARP on layer 3 devices

D. DHCP Snooping on layer 2 devices

View answer

Correct Answer: B

Question #5

An engineer is looking for a standards-driven YANG model to manage a multivendor networkenvironment. Which model must the engineer choose?

A. ative

B. penConfig

C. ETF http://www

D. EEE NETCONF

View answer

Correct Answer: C

Question #6

Refer to the exhibit.An engineer is designing a routing solution for a customer. The design must ensure that a failure of network 10.1.0.0/24, 10.1.2.0/24, 10.2.1.0/24, or 10.2.3.0/24 does not impact the core. It also requires fast convergence time during any link failover in the core or access networks.Which solution must the engineer select?

A. Add aggregation layer between core and access networks

B. Enable graceful restart on routers A and C

C. Enable FRR for the connected networks of routers A and

D. Enable summarization on routers A and C

View answer

Correct Answer: C

Question #7

Which is a benefit of a cloud-based SD-WAN deployment?

A. ecurity never an issue

B. ontroller availability never an issue

C. ight be required for compliance with industry standards

D. nstant scale

E. gility of change dependent only on your own internal IT processes

View answer

Correct Answer: D

Question #8

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. down bit

B. split-horizon

C. route tags

D. summarization

View answer

Correct Answer: C

Question #9

Which two BGP features will result in successful route exchanges between eBGP neighbors sharing the same AS number? (Choose two.)

A. advertise-best-external

B. bestpath as-path ignore

C. client-to-client reflection

D. as-override

E. allow-as-in

View answer

Correct Answer: DE

Question #10

Refer to the exhibits. An engineer is troubleshooting an issue in which the Gig0/2 interface on a Cisco switch named SW2 fails to become the root port. Which two commands must be run on SW2 to resolve this issue? (Choose two.)

A. SW2(config-if)# no spanning-tree cost 4

B. SW2(config)# interface Gig0/2

C. SW2(config-if)# spanning-tree cost 4

D. SW2(config)# interface Fa0/3

E. SW2(config-if)# spanning-tree cost 5

View answer

Correct Answer: BE

Question #11

Refer to the exhibits. An engineer is troubleshooting an issue in which the Gig0/2 interface on a Cisco switch named SW2 fails to become the root port. Which two commands must be run on SW2 to resolve this issue? (Choose two.)

A. SW2(config-if)# no spanning-tree cost 4

B. SW2(config)# interface Gig0/2

C. SW2(config-if)# spanning-tree cost 4

D. SW2(config)# interface Fa0/3

E. SW2(config-if)# spanning-tree cost 5

View answer

Correct Answer: BE

Question #12

When a network is designed using IS-IS protocol, which two circuit types are supported? (Choosehttp://www.justcerts.comP-two.)

A. onbroadcast multiaccess

B. ultiaccess

C. oint-to-multipoint

D. onbroadcast

E. oint-to-point

View answer

Correct Answer: BE

Question #13

Refer to the exhibit. An architect is designing a BGP solution to connect a remote branch to a service provider. There are several prefixes within the branch that the company does not want to be advertised to the Internet. Which solution should the architect use to accomplish this?

A. Attach the No-Export community with the prefixes to exclude

B. Use the BGP No-Advertise community for the prefixes to exclude

C. Set the BGP Internet community for all prefixes

D. Implement the NOPEER community

View answer

Correct Answer: A

Question #14

Which integration capability does gRPC provide?

A. Aleveraging the LDAP protocol for authentication and directory services ensuring secure access control in RPC communications

B. Bleveraging the XMPP protocol for real-time messaging and collaboration between client and server applications

C. Cleveraging protocol buffers to provide efficient serialization and deserialization of structured data over the network

D. Dleveraging GRAPH-API for network monitoring and management providing comprehensive visibility into RPC-related metrics and performance statistics

View answer

Correct Answer: C

Question #15

Refer to the exhibit. AS65533 and AS65530 are announcing a partial Internet routing table as well as their IP subnets. An architect must create a design that ensures AS64512 does not become a transit AS. Which filtering solution must the architect choose?

A. no-advertise

B. next-hop

C. no-export

D. maximum-prefix

View answer

Correct Answer: C

Question #16

A network engineer must optimize a campus OSPF deployment. Currently, each time a type 1 or type 2 LSA is generated within an area, the OSPF process must recompute the entire SPT. Which solution improves the recomputation process?

A. SPF

B. PRC

C. BFD

D. iSPF

View answer

Correct Answer: D

Question #17

A customer's environment includes hosts that support IPv6-only. Several of these hosts must communicate with a public web server that has only IPv4 domain name resolution. Which solution should the customer use in this environment?

A. utilize NAT64 to translate the addresses

B. Implement NAT44 at the edge of the customer network

C. use 6to4 and a tunnel to translate the addresses

D. implement 6PE to resolve hostname resolution

E. Reveal Answer

View answer

Correct Answer: A

Question #18

A company is using OSPF between its HQ location and a branch office. HQ is assigned area 0 and the branch office is assigned area 1. The company purchases a second branch office, but due to circuit delays to HQ, it decides to connect the new branch office to the existing branch office as a temporary measure. The new branch office is assigned to area 2. Which OSPF configuration enables all three locations to exchange routes?

A. The existing branch office must be configured as a stub area

B. A virtual link must be configured between the new branch office and HQ

C. A sham link must be configured between the new branch office and HQ

D. The new branch office must be configured as a stub area

View answer

Correct Answer: B

Question #19

Refer to the exhibit. A network engineer with an employee ID: 4433:77:420 must design a BGP solution based on these conditions:- Traffic sessions occur between the branches and the data center.- Branch B has limited resources to process routing updates.- HQ must filter out all prefixes from branch A to R4.Which outbound route filtering (ORF) solution must the engineer choose?

A. Use a prefix list with the 10

B. Use a prefix list with the 10

C. Use a prefix list with the 192

D. Use a prefix list with the 192

View answer

Correct Answer: B

Question #20

Which design consideration must be made when using IPv6 overlay tunnels?

A. verlay tunnels that connect isolated IPv6 networks are considered a final IPv6 network architecture

B. verlay tunnels should only be considered as a transition technique toward a permanent solution

C. verlay tunnels should be configured only between border devices and require only the IPv6 protocol stack

D. verlay tunneling encapsulates IPv4 packets in IPv6 packets for delivery across an IPv6 infrastructure

View answer

Correct Answer: B

Question #21

An architect is designing a network solution for a customer. The network is IPv6-only with 1000 hosts. The design must provide external access to up to 10 concurrent IPv6 hosts to allow communication with legacy IPv4 devices on an adjacent network. The customer set aside 10 IPv4 addresses to allow for one-to-one communication between hosts. Which solution must the architect select?

A. static NAT-PT

B. dynamic NPTv6

C. stateful NAT64

D. dynamic NAT-PT

View answer

Correct Answer: C

Question #22

A network engineer must design an MSDP multicast solution to provide RP resilience in a network with two separate domains. Also, multicast sources and receivers must register with the local RP. Which solution must the engineer choose?

A. Configure the RP has value to 0, and traffic will route to the closest RP

B. Configure the RP loopback interface with the same IP address/32, and traffic will route to the closest RP

C. Configure the RP group ranges to split the multicast traffic, and traffic will route to the longest match

D. Configure the RP priority with the same value, and traffic will route to the closest RP

E. Reveal Answer

View answer

Correct Answer: B

Question #23

An architect is designing a network solution for a customer. The network is IPv6-only with 1000 hosts. The design must provide external access to up to 10 concurrent IPv6 hosts to allow communication with legacy IPv4 devices on an adjacent network. The customer set aside 10 IPv4 addresses to allow for one-to-one communication between hosts. Which solution must the architect select?

A. static NAT-PT

B. dynamic NPTv6

C. stateful NAT64

D. dynamic NAT-PT

View answer

Correct Answer: C

Question #24

Which function are fabric intermediate nodes responsible for in an SD-Access Architecture?

A. apping EIDs to RLOCs

B. ncapsulating user traffic in a VXLAN header including the SGT

C. egistering new endpoints in the HTDB

D. ransporting IP packets between edge nodes and border nodes

View answer

Correct Answer: D

Question #25

http://www.justcerts.comP-Which consideration must be taken into account when using the DHCP relay feature in a Cisco SD-Access Architecture?

A. HCP-relay must be enabled on fabric edge nodes to provide the correct mapping of DHCP scope to the local anycast gateway

B. DHCP server must be enabled on the border nodes to allow subnets to span multiple fabric edges

C. HCP servers must support Cisco SD-Access extensions to correctly assign IPs to endpoints in an SD-Access fabric with anycast gateway

D. HCP Option-82 must be enabled to map the circuit IP option to the access fabric node where the DHCP discover originated

View answer

Correct Answer: D

Question #26

Refer to the exhibit. EIGRP has been configured on all links. The spoke nodes have been configured as EIGRP stubs, and the WAN links to R3 have higher bandwidth and lower delay than the WAN links to R4. When a link failure occurs at the R1-R2 link, what happens to traffic on R1 that is destined for a subnet attached to R2?

A. R1 has no route to R2 and drops the traffic

B. R1 load-balances across the paths through R3 and R4 to reach R2

C. R1 forwards the traffic to R3, but R3 drops the traffic

D. R1 forwards the traffic to R3 in order to reach R2

View answer

Correct Answer: A

Question #27

Refer to the exhibit. An engineer is planning an IPv4 to IPv6 migration solution for a customer. The routers in the network can support IPv4 and IPv6, except for the DWDM routers. The DWDM routers provide a Layer 2 link in which the routers peer directly with each other across a DWDM circuit. The circuit also provides connectivity between the mail servers. Which IPv6 migration technique must the engineer deploy?

A. ISATAP

B. dual-stack

C. 6to4

D. 6rd

View answer

Correct Answer: A

Question #28

Currently, inter-VRF routing between the global routing table and VRF-A is accomplished on the client firewall, but the customer wants to do this on the core network layer. The customer does not want to run BGP, VRF-Lite, or static routing. Which mechanism meets the requirements?

A. inter-VRF can only be used on an external device with a link in each VRF

B. policy-based routing with the global set statement in a route map

C. route map that matches access lists and prefix lists with the import feature

D. VRF receive feature under the global routing interfaces

View answer

Correct Answer: D

Question #29

Currently, inter-VRF routing between the global routing table and VRF-A is accomplished on the client firewall, but the customer wants to do this on the core network layer. The customer does not want to run BGP, VRF-Lite, or static routing. Which mechanism meets the requirements?

A. inter-VRF can only be used on an external device with a link in each VRF

B. policy-based routing with the global set statement in a route map

C. route map that matches access lists and prefix lists with the import feature

D. VRF receive feature under the global routing interfaces

View answer

Correct Answer: D

Question #30

An engineer must design a multicast network for a financial application. Most of the multicast sources also receive multicast traffic (many-to-many deployment model). To better scale routing tables, the design must not use source trees. Which multicast protocol satisfies these requirements?

A. PIM-SSM

B. PIM-SM

C. MSDP

D. BIDIR-PIM

E. Reveal Answer

View answer

Correct Answer: D

Question #31

A company wants to deploy IPv6 within its existing network infrastructure. All current infrastructure equipment supports IPv6, and the company wants a migration strategy that must not require purchasing additional equipment. The plan must keep operational management costs low, support IPv6 multicast, and allow applications to migrate using DNS. Which strategy must the company choose?

A. hybrid ISATAP tunnel model

B. hybrid manual tunnel model

C. dual-stack model

D. service block model

View answer

Correct Answer: C

Question #32

In Cisco SD-Access, virtual networks create segmentation that allows for separation of users and resources. How is this type of segmentation described?

A. nter-VN

B. icro

C. acro

D. tretched

View answer

Correct Answer: C

Question #33

Refer to the exhibit.An architect must design a solution that uses the direct link between R1 and R2 for traffic from 10.10.10.0/24 toward network 10.10.20.0/24. Which solution should the architect include in the design?

A. Configure the OSPF cost of the link to a value lower than 30

B. Lower the Administrative Distance for OSPF area 0

C. Place the link into area 2 and install a new link between R1 and R2 in area 0

D. Configure the link to provide multiarea adjacency

View answer

Correct Answer: D

Question #34

Which solution allows overlay VNs to communicate with each other in an SD - WAN Architecture?

A. External fusion routers can be used to map VNs to VRFs and selectively route traffic between VRFs

B. GRE tunneling can be configured between fabric edges to connect one VN to another

C. SGTs can be used to permit traffic from one VN to another

D. Route leaking can be used on the fabric border nodes to inject routes from one VN to another

View answer

Correct Answer: B

Question #35

Which feature must be incorporated into the campus LAN design to enable Wake on LAN?

A. ynamic ARP Inspection Snooping on layer 2 devices

B. irected broadcasts on layer 3 devices

C. roxy ARP on layer 3 devices http://www

D. HCP Snooping on layer 2 devices

View answer

Correct Answer: B

Question #36

Refer to the exhibit.Refer to the exhibit. An architect is designing an IPv4 plan using the 172.16.0.0/16. The design must maximize the number of subnets while meeting these requirements:500 hosts within the server room100 hosts at the remote site25 hosts at the access siteWhich plan must the architect choose?A)B)C)D)

A. Option A

B. Option B

C. Option C

D. Option D

View answer

Correct Answer: B

Question #37

An engineer must connect a new remote site to an existing OSPF network. The new site consists of two low-end routers, one for WAN, and one for LAN. There is no demand for traffic to pass through this area. Which area type does the engineer choose to provide minimal router resource utilization, while still allowing for full connectivity to the rest of the network?

A. not so stubby

B. totally not so stubby

C. totally stubby area

D. stubby area

View answer

Correct Answer: C

Question #38

Which design consideration must be made when using IPv6 overlay tunnels?

A. verlay tunnels that connect isolated IPv6 networks can be considered a final IPv6 network architecture

B. verlay tunnels should only be considered as a transition technique toward a permanent solution

C. verlay tunnels can be configured only between border devices and require only the IPv6 protocol stack

D. verlay tunneling encapsulates IPv4 packets in IPv6 packets for delivery across an IPv6 infrastructure

View answer

Correct Answer: B

Question #39

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. se a single IP address to create overload NAT

B. se a single IP address to create a static NAT entry

C. uild one-to-one NAT translation for every user that needs access

D. e-IP overlapping address space in the acquired company

View answer

Correct Answer: A

Question #40

Which encoding languages are supported in NETCONF compared to RESTCONF?

A. NETCONF supports XML and JSON, and RESTCONF supports XML

B. NETCONF supports XML, and RESTCONF supports JSON

C. NETCONF supports JSON, and RESTCONF supports XML

D. NETCONF supports XML, and RESTCONF supports XML and JSON

View answer

Correct Answer: D

Question #41

Which Cisco product were incorporated into Cisco ISE between ISE releases 2.0 and 2.3?

A. Cisco ESA

B. Cisco ASA

C. Cisco ACS

D. Cisco WSA

View answer

Correct Answer: C

Question #42

A router running ISIS is showing high CPU and bandwidth utilization. An engineer discovers that the router is configured as L1/L2 and has L1 and L2 neighbors. Which step optimizes the design to address the issue?

A. Make this router a DIS for each of the interfaces

B. Disable the default behavior of advertising the default route on the L1/L2 router

C. Configure the router to be either L1 or L2

D. Configure each interface as either L1 or L2 circuit type

View answer

Correct Answer: D

Question #43

Refer to the exhibit. EIGRP has been configured on all links. The spoke nodes have been configured as EIGRP stubs, and the WAN links to R3 have higher bandwidth and lower delay than the WAN links to R4. When a link failure occurs at the R1-R2 link, what happens to traffic on R1 that is destined for a subnet attached to R2?

A. 1 has no route to R2 and drops the traffic

B. 1 load-balances across the paths through R3 and R4 to reach R2

C. 1 forwards the traffic to R3, but R3 drops the traffic

D. 1 forwards the traffic to R3 in order to reach R2

View answer

Correct Answer: A

Question #44

An engineer must design a solution to provide backup connectivity between two sites. The engineer plans to use an Internet connection, but company policy requires the connection to be encrypted. Additionally, there are several applications that utilize multicast to deliver video streams between the sites. Which technology should the design include?

A. GRE over IPsec

B. IPsec direct encapsulation

C. GETVPN

D. DMVPN

View answer

Correct Answer: A

Question #45

A company wants to deploy IPv6 within its existing network infrastructure. All current infrastructure equipment supports IPv6, and the company wants a migration strategy that must not require purchasing additional equipment. The plan must keep operational management costs low, support IPv6 multicast, and allow applications to migrate using DNS. Which strategy must the company choose?

A. ybrid ISATAP tunnel model

B. ual-stack model

C. ybrid manual tunnel model

D. ervice block model

View answer

Correct Answer: B

Question #46

An engineer is tasked with designing a dual BGP peering solution with a service provider. The design must meet these conditions:- The routers will not learn any prefix with a subnet mask greater than /24.- The routers will determine the routes to include in the routing table based on the length of the mask alone.- The routers will make this selection regardless of the service provider configuration.Which solution should the engineer include in the design?

A. Use a route map and access list to block the desired networks, and apply the route map to BGP neighbors inbound

B. Use a route map and prefix list to block the desired networks, and apply the route map to BGP neighbors outbound

C. Use an IP prefix list to block the desired networks and apply the IP prefix list to BGP neighbors outbound

D. Use an IP prefix list to block the desired networks and apply the IP prefix list to BGP neighbors inbound

View answer

Correct Answer: D

Question #47

An engineer must design a routing solution for a company that is single-homed to an ISP. The company's goal is to run BGP between the CE and the PE devices. To support running BGP, the company obtained a public AS number and IP subnet from ARIN. Which solution must the engineer select?

A. - The customer announces the default route to the ISP

B. - The customer announces the public IP subnet to the ISP

C. - The ISP announces the customer public IP subnet

D. - The customer announces the public IP subnet to the ISP

View answer

Correct Answer: D

Question #48

An engineer is creating a design to enable IPv6 to run on an existing IPv4 IS-IS network. The IPv4 and IPv6 topologies will match exactly, and the engineer plans to use the same IS-IS router levels for each protocol per interface. Which IS-IS design is required?

A. multi topology without enabling transition feature

B. multi topology with transition feature enabled

C. single topology without enabling transition feature

D. single topology with transition feature enabled

View answer

Correct Answer: C

Question #49

Currently, inter-VRF routing between the global routing table and VRF-A is accomplished on the client firewall, but the customer wants to do this on the core network layer. The customer does not want to run BGP, VRF-Lite, or static routing. Which mechanism meets the requirements?

A. inter-VRF can only be used on an external device with a link in each VRF

B. policy-based routing with the global set statement in a route map

C. route map that matches access lists and prefix lists with the import feature

D. VRF receive feature under the global routing interfaces

View answer

Correct Answer: D

Question #50

A company has many spoke sites with two data centers. The company wants to exchange the routing information between the data centers and the spoke sites using EIGRP. All locations belong to a single AS, and auto- summarization is disabled. Which two actions must the company choose? (Choose two.)

A. Split the network into two separate ASs

B. Exchange all routes between locations

C. Summarize the routes between the hubs

D. Make each spoke site router a stub router

E. Summarize the routes from spokes to the hubs

View answer

Correct Answer: BE

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