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300-420 Exam Dumps - Designing Cisco Enterprise Networks (ENSLD)

Question # 4

Which component of Cisco SD-Access integrates with Cisco DNA Center to perform policysegmentation and enforcement through the use of security group access control lists and security group tags?

A.

Cisco Application Policy Infrastructure Controller Enterprise Module

B.

Cisco Network Data Platform

C.

Cisco Identity Services Engine

D.

Cisco TrustSec

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Question # 5

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?

A.

GLBP

B.

IRDP

C.

VRRP

D.

HSRP

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Question # 6

Refer to the exhibit.

A network engineer must design a multicast solution based on:

* Many-to-many communications between the users and sources

* Support of up to 50 multicast sources

* Users that must register for steams

Which multicast solution must the engineer select?

A.

Any Source Multicast

B.

Bidirectional PIM

C.

Source-Specific Multicast

D.

Multicast VPN

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Question # 7

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.

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Question # 8

An architect is designing a multicast solution for a network that contains over 100 routers. The architect plans to create several multicast domains and balance the PIM-SM traffic within the network. Which technology should the architect include in the design?

A.

DVMRP

B.

IGMP

C.

MOSPF

D.

MSDP

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Question # 9

An engineer must propose a solution for a campus network that includes the capability to create multiple Layer 3 virtual networks. Each network must have its own addressing structure and routing table for data forwarding. The solution must be scalable to support hundreds of virtual networks and allow simple configuration and management with minimal administrative overhead. Which solution does the engineer recommend?

A.

hop-by-hop EVN

B.

multihop MPLS core

C.

multihop IPsec tunneling

D.

hop-by-hop VRF-Lite

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Question # 10

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.)

A.

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

B.

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

C.

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

D.

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

E.

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

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Question # 11

What is the purpose of a TLOC extension in a Cisco SD-WAN network fabric?

A.

to facilitate WAN Edge router redundancy within a site

B.

to identify the physical interface where a WAN Edge router connects to the WAN transport network

C.

to expand the number of colors that are potentially applied to a network transport interface

D.

to aggregate multiple physical interfacesinto a single logical Interface

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Question # 12

Which routes does the overlay management protocol advertise in an SD-WAN overlay?

A.

underlay, MPLS, and overlay

B.

primary, backup, and load-balanced

C.

prefix, TLOC, and service

D.

Internet, MPLS, and backup

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Question # 13

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

A.

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

B.

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

C.

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

D.

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

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Question # 14

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?

A.

DMVPN

B.

EasyVPN

C.

GETVPN

D.

L2TP

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Question # 15

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?

A.

Stub area

B.

Sham link

C.

Virtual link

D.

NSSA

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Question # 16

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?

A.

Make R31 an L1 router.

B.

Make R3 an L1L2 router

C.

Make Area 0 L2-only

D.

Make R11 an L2 router.

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Question # 17

Refer to the exhibit.

An architect is designing an EIGRP solution based on these requirements:

* Traffic forwarding should use the best two paths while all links are available

* Single path failure must not impact traffic between branch and HQ

Which solution must the architect select?

A.

Maximum-paths 2

B.

Add-paths 2

C.

Metric weights 010100

D.

Variance 2

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Question # 18

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 router levels for each protocol per interface. Which IS-IS design is required?

A.

single topology without enabling transition feature

B.

single topology with transition feature enabled

C.

multi topology with transition feature enabled

D.

multi topology without enabling transition feature

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Question # 19

Which QoS feature responds to network congestion by dropping lower priority packets?

A.

CBWFQ

B.

tail drop

C.

WRED

D.

strict priority

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Question # 20

Drag and drop the components in a Cisco SD-Access architecture from the left onto their descriptions on the right.

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Question # 21

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

A.

mapping EIDs to RLOCs

B.

encapsulating user traffic in a VXLAN header including the SGT

C.

registering new endpoints in the HTDB

D.

transporting IP packets between edge nodes and border nodes

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Question # 22

Which NETCONF operation creates filtering that is specific to the session notifications?

A.

B.

C.

D.

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Question # 23

Drag and drop the descriptions from the left onto the Cisco SD-WAN component they describe on the right.

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Question # 24

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

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Question # 25

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?

A.

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

B.

Create an OSPF virtual link between routers E and F.

C.

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

D.

Make area 10 a not-so-stubby area.

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Question # 26

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?

A.

Multihop

B.

Multipath Load Sharing

C.

Next-Hop Address Tracking

D.

AS-Path Prepending

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Question # 27

An engineer is designing a Layer 3 campus network running EIGRP between the core, aggregation, and access layers. The access layer switches will be connected to the aggregation layer using Layer 3 copper connections. The engineer wants to improve convergence time for access layer switch failures. Which technique must the design include?

A.

enabling BFD for EIGRP on the access layer uplinks

B.

reducing the EIGRP Hello / Hold timer values

C.

EIGRP summarization from core to aggregation layer

D.

EIGRP summarization from access to aggregation layer

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Question # 28

Which design achieves SD-WAN control plane redundancy?

A.

Configuring BFD on the WAN Edge routers

B.

Using multiple instances of vManage in clusters

C.

Deploying using a virtual platform like UCS or CSP

D.

Managing the underlay network with OMP

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Question # 29

An engineer must design a scalable QoS architecture that allows the separation of the traffic into classes on predefined business requirements. The design must also utilize the differentiated services code points as the QoS priority descriptor value and support at least 10 levels of classification. Which QoS technology should the engineer include in the design?

A.

RSVP

B.

Diffserv

C.

Best effort

D.

Interserv

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Question # 30

A company plans to transition to IPv6. They will link their IPv4 addresses to the lowest significant bits of the new Ipv6 addresses. A network administrator with an employee id: 4264:42:116 is preparing a mapping schema for the new IPv6 addresses. Which address does the 172.16.10.0/24 network translate to?

A.

2001:db8:abcd::ac10:a00/120

B.

2001:db8:abcd:172:16:10::/96

C.

2001:db8:abcd:11d8:a00/120

D.

2001:db8:ac10:0a00::/64

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Question # 31

Refer to the exhibit.

Which solution decreases the EIGRP convergence time?

A.

Enable subsecond timers

B.

Increase the hold time value

C.

Increase the dead timer value

D.

Enable stub routing on the spokes

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Question # 32

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?

A.

VPWS

B.

MPLS VPN

C.

DMVPN

D.

VPLS

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Question # 33

Refer to the exhibit. An architect must design an IP addressing scheme for a multisite network connected via a WAN transit. The campus site must accommodate 12,000 devices and the branch sites must accommodate 1,000 devices. Which address scheme optimizes network device resources, contains convergence events to the different blocks of the network, and ensures future growth of the network?

A.

Campus: 10.0.0.0/18

•Branch1: 10.0.192.0/21

•Branch2: 10.0.200.0/21

B.

• Campus: 10.0.0.0/16

•Branchi: 10.255.0.0/20

•Branch2: 10.255.16.0/20

C.

• Campus: 10.0.0.0/10

•Branch1: 10.64.0.0/10

•Branch2: 10.128.0.0/10

D.

• Campus: 10.0.0.0/20

•Branch1: 10.0.64.0/21

Branch2: 10.0.128.0/21

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