Cisco 300-420 Designing Cisco Enterprise Networks (ENSLD) Exam Practice Test

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

An architect must design a QoS model for a business-critical application that Is delay-sensitive and requires high bandwidth. The company's head office hosts the application, and DMVPN tunnels protected with IPsec provide connectivity between the head office and branches. Which solution must the architect choose?

Refer to the exhibit. Where must an architect plan for route summarization for the topology?

What is the purpose of an edge node in an SD-Access network fabric?

Refer to the exhibit. Customers report low video quality and delays when having point-to-point telepresence video calls between the two locations. An architect must optimize a design so that traffic follows the same path for egress and ingress traffic flows. Which technique optimizes the design?

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?

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

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 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 creating branch office as a temporary measure. The new branch office is assigned area 2. Which OSPF configuration enables all three locations to exchange routes?

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?

Refer to the exhibit. Which two points in the network must an engineer configure the ports for explicit trust when using a DiffServ model?

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?

Drag and drop the model driven telemetry characteristics from the left onto the mode they belong to on the right.

A company wants to switch from static routing to a dynamic routing protocol to ease the administrative and operational overhead. The network topology is hub and spoke, and the branches use DM VPN back to the hub with two 10-Mbps internet connections. The branch routers are multivendor and have limited memory and CPU resources. Which routing protocol and design solution meets the requirements?

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

Drag and drop the characteristics from the left onto the correct telemetry mode on the right.

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?

Which protocol is deployed through LAN automation to build node-to-node underlay adjacencies in SDA?

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 company requires a private WAN design that allows remote sites to connect to HQ. The design must ensure that:

traffic is always encrypted

forwarding overhead is reduced

management of security Is centralized

multicast traffic is supported

Which technology must the company select?

Which queuing structure is used on SD-WAN Edge routers?

Drag and drop the characteristics from the left onto the Yang model they describe on the right.

Select and Place:

A large chain of stores currently uses MPLS-based T1 lines to connect their stores to their data center. An architect must design a new solution to improve availability and reduce costs while keeping these considerations in mind:

» The company uses multicast to deliver training to the stores.

» The company uses dynamic routing protocols and has implemented QoS.

» To simplify deployments, tunnels should be created dynamically on the hub when additional stores open.

Which solution should be included in this design?

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?

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

What is the main purpose of the Cisco SD-Access underlay design?

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?

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?

An architect is designing a connectivity solution for a customer's two small branch offices. The customer wants a cost-effective design, no routing overload, and some down time during the year is acceptable. Which connectivity solution must the architect choose?

Refer to the exhibit.

Which solution decreases the EIGRP convergence time?

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?

Which feature is required for graceful restart to recover from a processor failure?

An architect must design a topology for a WAN network that satisfies these requirements:

Devices must be able to make informed decisions.

Suboptimal paths are allowed only In case of a failure.

Backup paths must always be available.

Which topology must the architect select?

A customer reports that each time a networking component fails, OSPF recalculates the backup path, with causes a short outage. Which solution must the customer implement to improve this situation?

Refer to the exhibit. Which two solutions maximize the use of the links between the core and distribution layers? (Choose two.)

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

An architect must address sustained congestion on the access and distribution uplink of network. QoS has already been implemented and optimized, but it is no longer effective in ensuring optimal network performance. Which two solutions should the architect use to improver network performance? (Choose two)

An engineer must design a management network that enables SSH, NTP, FTP, and SNMP over the production network. The design requires the management of routers and switches that exist across different networks. Which feature must the design include?

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

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

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?

Refer to the exhibit A customer requires a Layer 2 network designed to support:

500 active logical ports

trunking of 30 VLANs

convergence of less than 1 second

Which Spanning Tree Protocol must be selected?

Which two techniques improve the application experience in a Cisco SD-WAN design? (Choose two.)

A company must automate a set of complex changes aligned with DR testing in the network. These changes are specific, and the DR playbook will be adjusted in the future. The playbook has diverse routing and switching assets in scope as well as multiple vendor and hardware platforms. A developer will create a thin, web front-end microservice and integrate with an Open daylight controller to push changes to the network. Which YANG model should be used?

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 room

100 hosts at the remote site

25 hosts at the access site

Which plan must the architect choose?

A)

B)

C)

D)

An architect is designing a network for an enterprise site. The design must use an active/backup design for the WAN. It must guarantee the SLA for several applications regardless of which connection is used. Which deployment model should the architect choose?

Drag and drop the characteristics from the left onto the YANG models they describe on the right. Not all options are used.

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

The customer solution requires QoS to support streaming multimedia over a WAN. An architect chooses to use Per-Hop Behavior. Which solution should the engineer use to of mark traffic traveling between branch sites?

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?

Which topology within a network underlay eliminates the need for first hop redundancy protocols while

improving fault tolerance, increasing resiliency, and simplifying the network?

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

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

In a Cisco SD-Access fabric, switch node Is equivalent to an access layer switch In a traditional three-tier campus network design?

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

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

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

Which element in a Cisco SD-WAN architecture maintains a centralized routing table?

Refer to the exhibit. All routers currently reside in OSPF area 0. The network manager recently used R1 and R2 as aggregation routers for remote branch locations and R3 and R4 for aggregation routers for remote office locations. The network has since been suffering from outages, which are causing frequent SPF runs. To enhance stability and introduce areas to the OSPF network with the minimal number of ABRs possible, which two solutions should the network manager recommend? (Choose two.)

An architect is designing a network that will utilize the spanning tree protocol to ensure a loop-free topology. The network will support an engineering environment where it is necessary for end users to connect their own network switches for testing purposes. Which feature should the architect include in the design to ensure the spanning tree topology is not affected by these rogue switches?

Refer to the exhibit. An architect must design a resilient gateway solution based on these requirements:

VLAN 10 and VLAN 11 support voice and video applications.

Link and node failures must have minimal impact on traffic.

Provide protection against false hello packets.

Support IPv6.

Which solution must the architect choose?

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.)

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?

Which AES mode should be used in a Cisco SD-WAN environment that includes multicast applications?

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?

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

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?

What are two valid scaling techniques when an EIGRP network is designed that consists of more than 1000 routers? (Choose two.)

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

A company wants to enable several third-party video conferencing networks based on multicast services. The video conferencing platform can accommodate numerous and dispersed senders and receivers in third-party networks The interior routing protocol is OSPF and the exterior routing protocol is BGP Which multicast mode must be selected to achieve this goal?

Refer to the exhibit. A customer is planning to deploy a new branch in New York. The new office will not exceed 1024 users. Which subnet must be used to provide maximum number of host addresses while not providing more than necessary?

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

What is the purpose of service routes in OMP updates?

Which control plane protocol is responsible for ElD-to-RLOC mapping concerning SO-Access Architecture?

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)

B)

C)

D)

E)

What are the two purpose of the RPF check in multicast routing?

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

An engineer must design a solution to connect a customer to the Internet. The solution will include a Layer 3 circuit with a CIR of 50 Mbps from the service provider. The hand-off from the provider's switch to the customer's router is 1Gbps. Which solution should the engineer include to prevent potential issues with choppy voice traffic?

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?

An engineer must establish a direct connection between two remote offices. The new connection must be established using a logical path, share a common broadcast domain, connect over private WAN, and have as little overhead as possible. Which technology must the engineer choose?

What does the fabric data plane leverage in SD-Access Architecture?

An engineer must peer with an ISP for internet connectivity using BGP, initially, the engineer wants to receive only specific prefixes from the ISP and a default route. However, the solution must provide the flexibility to add prefixes in the future at short notice. The ISP has a two-week change process in place. Which route filtering solution must the engineer employ?

A branch office has a primary L3VPN MPLS connection back to the main office and an IPSEC VPN tunnel that serves as backup. Which design ensures that data is sent over the backup connection only if the primary MPLS circuit is down?

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.)

Which integration capability does gRPC provide?

Refer to the exhibit. An architect is designing a network that requires route redistribution. The design must prevent route feedback and the creation of routing loops. The OSPF domain is using default metrics, and the IS-IS domain is using narrow metrics. Which solution must the architect select?

Drag and drop the Cisco SD-WAN components from the left onto their definitions on the right.

Which consideration must be made when designing a Cisco SD-Access fabric underlay?

Refer to the exhibit. An architect is designing a Layer 2 network for a customer. The network will use the spanning-tree protocol. During a link failure between SW1 and SW2, the fastest possible convergence time is desired. Which solution must the architect select?

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?

Exhibit:

Refer to the exhibit An engineer is designing an OSPF solution with these requirements:

NMS server will manage R5 and R6.

Upon failure of R1. all NMS traffic should be routed through R4.

Upon failure of the link between R5 and R6. all traffic destined for 10.6.6.6 should be routed through R4

Which solution must the engineer choose?

Refer to the exhibit. A company has some offices that are connected via dark fiber in New York. A network architect must optimize the network design based on the EIGRP routing protocol. The network has hierarchical addressing between 10 and 12 routers in each office. Routing convergence time must be at the minimum. What must the network architect do to reduce the query range?

Refer to the exhibit An architect is designing an IPv4 plan using the 172 20 0.0/16 network The design must maximize the number of subnets and minimize the number of wasted IP addresses In addition, the plan must allocate a subnet to these customers and links

Customer A, which supports 125 hosts

Customer D, which supports 62 hosts

Links B C. and E

Which two configuration sets meet these requirements'? (Choose two)

A)

B)

C)

D)

E)

A company wants to switch from static routing to a dynamic routing protocol to ease the administrative and operational overhead. The network topology is hub and spoke, and the branches use DMVPN back to the hub using two 100 Mbps internet connections. Both links must be used due to spikes in traffic, and routing must take traffic utilization of the links into account. Also, the branch routers have limited memory and CPU resources. Which routing protocol and design solution must the company choose?

Drag and drop the descriptions from the left onto the corresponding VPN types on the rights.

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

Which two statements about VRRP advertisements are true? (Choose two.)

Refer to the exhibit.

C0FD9F48 C9ACDC725EA850EC2476EE1E

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?

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

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?