Actual 300-420 ENSLD Updated Guides

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Cisco 300-420 ENSLD updated guides are online. If you decide to take 300-420 exam to be Cisco CCNP Enterprise certification, you can study the updated Cisco 300-420 ENSLD guides. Free updated Cisco 300-420 exam actual guides are below.

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1. An engineer is designing a campus network with Cisco Catalyst 95CO switches in the aggression layer. The design requires running nonblocking Layer 2 MEC from the aggregation layer to the access layer. The Catalyst switches are located on different campus floors for availability reasons, and each access switch veil contam a single VLAN.

Which technology must the engineer choose for the aggregation switches in the design?

VPC

VSS

StackWise Virtual

StackWise-180

2. Which design consideration must be made when dual WAN Edge routers are deployed at a branch site?

Use BGP AS-path prepending to influence egress traffic and use MED to influence ingress traffic from the branch.

HSRP priorities must match the OMP routing policy to prefer one WAN Edge over the other.

Traffic must be symmetrical as it egresses the WAN Edges and returns from remote sites for DPI to function properly.

Configure BFD between WAN Edge routers to detect sub-second link failures.

3. 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 resources utilization, while still allowing for full connectivity to the rest of the network?

not so stubby

totally not so stubby

totally stubby area

stubby area

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

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.

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.

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.

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.

5. 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

6. DRAG DROP

Drag and drop the characteristics from the left onto the telemetry mode they apply to on the right.

7. When a first hop redundancy solution is designed, which protocol ensures that load balancing occurs over multiple routers using a single virtual IP address and multiple virtual MAC addresses?

GLBP

IRDP

VRRP

HSRP

8. What is the purpose of a control plane node in a Cisco SD-Access network fabric?

to maintain the endpoint database and mapping between endpoints and edge nodes

to detect endpoints in the fabric and inform the host tracking database of EID-to-fabric-edge node bindings

to identify and authenticate endpoints within the network fabric

to act as the network gateway between the network fabric and outside networks

9. 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?

Aggressive timers

Next-hop address tracking

Graceful-restart

BFD

10. 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?

Increase the hello timers on both HSRP devices

Use the preempt delay feature on the primary HSRP device.

Use the preempt delay feature on the backup HSRP device

Configure a higher mac-refresh interval on both HSRP devices

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11. DRAG DROP

Drag and drop the characteristics from the left onto the configuration protocols they describe on the right.

12. A network engineer must connect two sites across a public network using a secure tunneling technology that

supports multicast traffic.

Which technology must be chosen?

IPsec

GRE

PPTP

GRE over IPsec

13. In a Cisco SD-Access fabric, which node facilities connectivity between the fabric and networks external to the fabric?

intermediate

edge

control plane

border

14. Refer to the exhibit.

A network engineer must improve the current IS-IS environment. The Catalyst switch is equipped with dual supervisors. Each time a stateful switchover occurs, the network experiences unnecessary route recomputation.

Which solution addresses this issue if the upstream router does not understand graceful restart messaging?

Enable IS-IS remote LFA FRR on both devices.

Enable NSR on the switch.

Enable NSF on the switch.

Configure ISIS aggressive timers on both devices.

15. Refer to the exhibit.

A customer experienced an unexpected network outage when the link between R1 and R2 went down. An architect must design a solution to ensure network continuity in the event the link fails again.

Which solution should the design include?

Make R31 an L1 router.

Make R3 an L1L2 router

Make Area 0 L2-only

Make R11 an L2 router.

16. An infrastructure team is concerned about the shared memory utilization of a device, and for this reason, they need to monitor the device state.

Which solution limits impact on the device and provides the required data?

IPFIX

static telemetry

on-change subscription

periodic subscription

17. Which nonproprietary mechanism can be used to automate rendezvous point distribution in a large PIM domain?

Embedded RP

BSR

Auto-RP

Static RP

18. Which method does Cisco SD-WAN use to avoid fragmentation issues?

PMTUD is used.

Traffic is marked with the DF bit set.

Jumbo frames are enabled.

Access circuits are configured with 1600 byte MTU settings.

19. DRAG DROP

Drag and drop the description from the left onto the corresponding WAN connectivity types and categories on the right.

20. An engineer must use YANG with an XML representation to configure a Cisco IOS XE switch with these specifications:

✑ IP address 10.10.10.10/27 configured on the interface GigabitEthernet2/1/0

✑ connectivity from a directly connected host 10.10.10.1/27

Which YANG data model set must the engineer choose?

A)

Option A

Option B

Option C

Option D

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21. Refer to the exhibit.

An engineer is designing a BGP solution for a client that peers with ISP1 for full Internet connectivity and with ISP2 for direct exchange of routes for several third parties.

Which action, when implemented on the edge routers, enables the client network to reach the Internet through ISP1?

Run an eBGP session within different VRFs for each IS

Advertise a default route for downstream routers within the client network.

Apply the AS-path prepend feature for ISP2.

Apply route filtering such that the client advertises only routes originated from its own A

22. Refer to the exhibit

A customer requires maximum uptime for the data plane between R1 and R3 running OSPF.

Which solution must the design include for high availability if the routing process on R2 requires maintenance?

BFD on all routers

nonstop forwarding on R1 and R3

nonstop forwarding on R3 only

graceful restart on all routers

23. A customer is discussing QoS requirements with a network consultant. The customer has specified that end-to-end path verification is a requirement.

Which QoS solution meets this requirement?

IntServ model with RSVP to support the traffic flows

DiffServ model with PHB to support the traffic flows

marking traffic at the access layer with DSCP to support the traffic flows

marking traffic at the access layer with CoS to support the traffic flows

24. Refer to the exhibit.

An engineer must optimize the traffic flow of the network.

Which change provides a more efficient design between the access and the distribution layer?

Add a link between access switch A and access switch B

Reconfigure the distribution switch A to become the HSRP Active

Change the link between distribution switch A and distribution switch B to be a routed link

Create an EtherChannel link between distribution switch A and distribution switch B

25. DRAG DROP

Drag and drop the elements from the left onto the protocols where they are used on the right.

26. An engineer is designing a network for a customer running a wireless network with a common VLAN for all APs. The customer is experiencing unicast flooding in the Layer 2 network between the aggregation and access layers. The customer wants to reduce the flooding and improve convergence time.

Which solution meets these requirements?

Migrate all APs to a common Layer 2 access layer switch and run Layer 3 from the aggregation layer to all remaining access layer switches.

Align HSRP primary and STP root bridges and reduce ARP timers to match CAM timers on the aggregation layer switches.

Migrate to a Layer 3 access campus design if the APs can run on separate VLANs.

Align HSRP primary and STP root bridges if the APs cannot run on separate VLANs.

27. A global organization with several branches hired a network architect to design an overlay VPN solution. The branches communicate with each other frequently. The customer expects to add more branches in the future. To meet the customer's security requirements, the architect plans to provide traffic protection using dynamic IPsec tunnels.

Which solution should the architect choose?

DMVPN

EasyVPN

GETVPN

L2TP

28. Which consideration must be taken into account when using the DHCP relay feature in a Cisco SD-Access Architecture?

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

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

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

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

29. A customer plans to adopt distributed QoS in their enterprise WAN. The policy must allow for individual packet marking according to the type of treatment required and for forwarding based on hop-by-hop treatment locally defined on each device.

Which technology must the customer select?

CBWFQ

LLQ

Diffserv

IntServ

30. Which two functions does the control plane node provide in a Cisco SD-Access architecture? (Choose two.)

LISP proxy ETR

host tracking database

policy mapping

map server

endpoint registration

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31. DRAG DROP

Drag and drop the steps WAN Edge performs when on-boarded into the Cisco SD-WAN overlay from the left into the order they are completed on the right.

32. When vEdge router redundancy is designed, which FHRP is supported?

HSRP

OMP

GLBP

VRRP

33. 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 ISAKM

Verify NHR

Verify crypto maps.

34. An engineer must propose a QoS architecture model that allows an application to inform the network of its traffic profile and to request a particular type of service to support its bandwidth and delay requirements. The application requires consistent and dedicated bandwidth end to end.

Which QoS architecture model meets these requirements?

DiffServ

LLQ

WRED

IntServ

35. Since installing a cisco TelePresence system, the company is experiencing other application having response issues when the system in use. As a result, the company asked an architect to recommend a QoS solution. The customer is currently using a CBWFQ policy to manage traffic on an internet connection with a speed of 100 Mbps.

Which link-capacity limit must the architect choose for strict-priority for the real-time traffic?

25 Mbps

50 Mbps

33 Mbps

75 Mbps

36. An engineer must design an in-band management solution for a customer with branch sites. The solution must allow remote management of the branch sites using management protocols over an MPLS WAN. Queueing is implemented at the remote sites using these classes:

How must the solution prioritize the management traffic over the WAN?

Mark the traffic with DSCP CS1 and map into Class2 with a minimum bandwidth assigned by reducing the bandwidth available to CIass3.

Mark the traffic with DSCP CS6 and map into Class1 with a minimum bandwidth assigned by reducing the bandwidth available to Class2

Mark the traffic with DSCP EF and map into Class1 with a minimum bandwidth assigned by reducing the bandwidth available to Class2.

Mark the traffic with DSCP CS2 and map into Class2 with a minimum bandwidth assigned by reducing the bandwidth available to Class3

37. Refer to the exhibit.

An architect must design a solution to connect bank site A with bank site B and support:

✑ network operation center monitoring end-to-end L3VPN and L2VPN traffic

✑ company adding thousands of routes in the next two years

Which two BGP solutions must the design include? (Choose two.)

Establish full mesh IBGP peering with ail routers in different IGP domains.

Redistribute different IGP domain routes in a BGP IPv4 routing instance.

Transport site routes using a BGP VPNv4 address family on the PE routers.

Apply BGP policies on all routers to filter out ABR and PE loopback IP addresses.

Connect multiple IGP'LDP domains using a BGP IPv4 unicast family on the AB

38. Which type of rendezvous point deployment is standards-based and support dynamic RP discovery?

Auto-RP

Anycast-RP

bootstrap router

static RP

39. When designing interdomain multicast, which two protocols are deployed to achieve communication between multicast sources and receivers? (Choose two.)

IGMPv2

BIDIR-PIM

MP-BGP

MSDP

MLD

40. Refer to the exhibit.

A customer is running HSRP on the core routers. Over time the company has grown and requires more

network capacity. In the current environment, some of the downstream interfaces are almost fully utilized, but others are not.

Which solution improves the situation?

Make router R2 active for half of the VLANs.

Add more interfaces to R1 and R2.

Configure port channel toward downstream switches.

Enable RSTP on the downstream switches.

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41. A network solution is being designed for a company that connects to multiple Internet service providers.

Which Cisco proprietary BGP path attribute will influence outbound traffic flow?

Local Preference

MED

Weight

AS Path

Community

42. Which function does the Cisco SD-Access intermediate node perform?

Act as LISP proxy tunnel router.

Route and transport IP traffic.

Act as an anycast Layer 3 gateway.

Map users to a virtual network.

43. Refer to the exhibit.

An engineer Is designing a multicampus Layer 3 Infrastructure using EIGRP as the routing protocol. The design must provide quick replies to queries In the event of a downlink, prevent unnecessary queries, and ensure that traffic does not unnecessarily transit the access layer.

Which two actions must the engineer take for the network design? (Choose two.)

Configure core layer switches as stub routers.

Configure distribution layer switches to summarize routes to the core layer.

Configure access layer switches as stub routers.

Configure access layer and core layer switches as stub routers.

Configure access layer switches to summarize routes to the distribution layer.

44. Which control-plane technology allows the same subnet to exist across multiple network locations?

LISP

VXLAN

FabricPath

ISE mobility services

45. A customer's current Layer 2 infrastructure is running Spanning Tree 802.1d, and all configuration changes are manually implemented on each switch.

An architect must redesign the Layer 2 domain to achieve these goals:

✑ reduce the impact of topology changes

✑ reduce the time spent on network administration

✑ reduce manual configuration errors

Which two solutions should the architect include in the new design? (Choose two.)

Implement Rapid PVST+ instead of ST

Implement MST instead of ST

Use VTP to propagate VLAN information and to prune unused VLANs.

Configure broadcast and multicast storm control on all switches.

Configure dynamic trunking protocol to propagate VLAN information.

46. Refer to the exhibit.

A customer needs to apply QoS to the network management traffic passing through the GigabitEthernet0/2 interface. All eight queuing classes are in use, so the new requirement must be integrated into the existing policy.

Which solution must the customer choose?

Mark traffic to DSCP CS5 and assign it to the SIGNALLING class. Then, baseline existing queue sizes to determine if additional bandwidth can be provisioned to the SIGNALLING class.

Mark the traffic to DSCP CS4 and assign it to the SIGNALLING class. Then, prioritize traffic within the class.

Mark the traffic to DSCP CS6 and assign it to the ROUTING class Then, prioritize traffic within the class.

Mark the traffic to DSCP CS2 and assign it to the ROUTING class Then, baseline existing queue sizes to determine if additional bandwidth can be provisioned to the ROUTING class

47. A company is running BGP on a single router, which has two connections to the same ISP.

Which BGP feature ensures traffic is load balanced across the two links to the ISP?

Multihop

Multipath Load Sharing

Next-Hop Address Tracking

AS-Path Prepending

48. An enterprise customer has these requirements:

✑ end-to-end QoS for the business-critical applications and VoIP services based on CoS marking.

✑ flexibility to offer services such as IPv6 and multicast without any reliance on the service provider.

✑ support for full-mesh connectivity at Layer 2.

Which WAN connectivity option meets these requirements?

VPWS

MPLS VPN

DMVPN

VPLS

49. 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 become a transit AS.

Which filtering solution must the architect choose?

Maximum-prefix

No-advertise

Next-hop

No Export

50. 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?

iSPF

BFD

SPF

PRC

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51. What is the role of a control-plane node in a Cisco SD-Access architecture?

fabric device that connects wired endpoints to the SD-Access fabric

map system that manages endpoint to device relationships

fabric device that connects APs and wireless endpoints to the SD-Access fabric

map system that manages External Layer 3 networks

52. Refer to the exhibit.

An architect must design an IPv6 migration solution for an enterprise customer to support these requirements:

* Clients will transition to the new IPv6 network, which provides NAT64 and IPv6 DNS resolution services, using the same DNS name that points to the IPv4 address.

* The service provider will create a client-facing IPv6 interface with a new IPv6 virtual address that points to the same IPv4 DNS server.

* The service provider will support clients that use global IPv6 addresses and encapsulate IPv4 packets into IPv6 tunnels.

Which two migration solutions must the architect choose? (Choose two.)

Use dual-stack lite from the MPLS network to the IG

Use IPv6 tunneling from the devices to the core MPLS network.

Use dual-stack lite from the devices to the core MPLS network.

Use NAT44/64 from the MPLS network to the IG

Use NAT44/64 from the devices to the core MPLS network.

53. DRAG DROP

Drag and drop the properties from the left onto the Cisco SD-WAN components that perform them on the right.

54. Which topology within a network underlay eliminates the need for first hop redundancy protocols while improving fault tolerance, increasing resiliency, and simplifying the network?

virtualized topology

routed access topology

Layer 2 topology

logical fabric topology

55. Which two border nodes are available in the Cisco SD-Access architecture? (Choose two.)

extended border

edge border

internal border

anywhere border

intermediate border

56. An engineer uses Postman and YANG to configure a router with:

✑ OSPF process ID 200

✑ network 172.16.10.128/26 enabled for Area 0

Which get-config reply verifies that the model set was designed correctly?

A)

Option A

Option B

Option C

Option D

57. A company uses cloud-based applications for voice and video calls, file sharing, content sharing, and messaging. During business hours, these applications randomly become slow and unresponsive. However, other applications work smoothly with the current applied QoS polices.

Which solution must the company choose to resolve the issue?

Identify the applications with NBAR2 and allocate the required bandwidth accordingly.

Identify the port used by each application and apply a minimum bandwidth guarantee.

Identify the applications and reserve the required bandwidth on the perimeter routers.

Identify the application ports, create groupings, and rate-limit the required bandwidth.

58. 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 memory

Which technology should the engineer include in the design?

PVST+

Rapid PVST+

MST

RSTP

59. An engineer is designing a multicast network for a financial application Most of the multicast sources also receive multicast traffic (many-to-many deployment model). To better routing tables, the design must not use source trees.

Which multicast protocol satisfies these requirements?

BIRDIR-PIM

PIM-SM

MSDP

PIM-SSM

60. 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?

PortFast

root guard

UplinkFast

BPDU guard

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61. Refer to the exhibit.

A network engineer is designing a network for AS100. The design should ensure that all traffic enters AS100 via link 1 unless there is a network failure. In the event of a failure, link 2 should function as the path for incoming traffic.

Which solution should the design include?

Modify the next-hop attribute on R3.

Use AS-Path prepending on R3.

Modify the next-hop attribute on R4.

Use AS-Path prepending on R4.

62. Which OSPF area blocks LSA Type 3, 4 and 5, but allows a default summary route?

normal

stub

NSSA

totally stubby

63. Which PIM mode uses a shared tree only?

bidirectional

sparse

dense

source-specific

64. An engineer uses Postman and YANG to configure a router with:

✑ OSPF process ID 400

✑ network 192.168.128.128/25 enabled for Area 0

Which get-config reply verifies that the model set was designed correctly?

A)

Option A

Option B

Option C

Option D

65. 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?

dual-stack

6to4

ISATAP

6rd

66. 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?

• The customer announces the public IP subnet to the ISP • The ISP announces the default route to the customer.

• The customer announces the public IP subnet to the ISP • The ISP announces the BGP table to the customer

• The ISP announces the customer public IP subnet. • The ISP announces the partial BGP table to the customer.

• The customer announces the default route to the ISP • The ISP announces the default route to the customer

67. What is the purpose of a Cisco SD-Access underlay network?

to abstract IP-based connectivity from physical connectivity

to emulate LAN segments to transport Layer 2 frames over a Layer 3 network

to establish physical connectivity between switches and routers

to provide virtualization by encapsulating network traffic over IP tunnels

68. 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 queries

Which two solutions must the architect select? (Choose two.)

route summarization

prefix lists

distribute lists

stub routing

static redistribution

69. Refer to the exhibit. A network engineer is designing an OSPF solution to connect a company's remote to a newly provisioned MPLS VPN backbone. Some of the branches have a direct dark fiber connection between each other. The engineer wants to ensure that the dark fibers are used only when the MPLS core is unavailable.

Which solution must the engineer choose?

Stub area

Sham link

Virtual link

NSSA

70. How is internet access provided to a WAN edge router that is connected to a MPLS transport link?

OMP advertises a default route from a WAN Edge router that is connected to the MPLS and internet transport networks

Internet access must be provided at the WAN Edge router through either a 4G/5G link or local Internet circuit

An extranet must be provided in the MPLS transport network to allow private traffic to reach the public internet

TLOC extensions are used to route traffic to a WAN Edge router that is connected to the Internet transport network

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71. An engineer uses Postman and YANG to configure a router with:

Which get-config replay verifies that the model set was designed correctly?

Option A

Option B

Option C

Option D

72. An architect is creating a migration strategy for a large organization in which the choice made by the application between IPv6 and IPv4 is based on the DNS request.

Which migration strategy does the architect choose?

AFT for public web presence

host-initiated tunnels

dual stack

site-to-site IPv6 over IPv4 tunnels

73. Refer to the exhibit.

Area 10 is a regular OSPF area and networks 10.1.1.0/24 and 172.16.1.0/24 are internal.

Which design provides optimal routing between both networks when the link between routers C and E fails?

Move the link between routers C and D to area 10.

Create an OSPF virtual link between routers E and

Create a tunnel between routers E and F in area 10.

Make area 10 a not-so-stubby area.

Actual 300-420 ENSLD Updated Guides

Actual 300-420 ENSLD Updated Guides

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