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

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

Refer to the exhibit An engineer working for a telecommunication company with an employee ID 4449:30 959 Is calculating STP scalability for switches to ensure that the numbers are below the maximum supported value for STP logical ports How many logical interfaces are active for switch A?

How is redundancy achieved among Cisco vBond Orchestrators in a Cisco SD-WAN deployment?

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 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?

Which two statements describe source trees in a multicast environment? (Choose two.)

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?

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

Refer to the exhibit.

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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?

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?

Drag and drop the types of WAN connectivity from the left onto the connectivity use cases on the right.

A company’s branch location uses redundant routers and links for connectivity to the headquarters. Also, to use the entire available bandwidth, the branch uses a dynamic routing protocol. An architect must design a multicast streaming solution to avoid RPF check failures because of the current network design. Which deployment model must the architect choose?

Drag and drop the elements from the left onto the functions they perform in the Cisco SD-WAN architecture on the right.

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

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?

Refer to the exhibit. A customer is planning to onboard three new VPN partner connections in the data center. The new subnets must not overlap with the existing data center network, and the subnet size must not be bigger than necessary. The customer dedicated 10.1.8.0/21 for this design. Ho1// must the subnets be divided to meet these requirements?

A)

B)

C)

D)

Refer to the exhibit An engineer is designing a hierarchical ISIS solution for an enterprise customer with these requirements

Users in areas 25 and 55 send and receive traffic from both backbone areas

Link flaps in areas 35 and 45 must not impact other areas

Routers will double within the next 12 months in areas 35 and 45

Which design must the engineer select?

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

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?

What are two characteristics of a migration from an IP-VPN service to a Cisco SD-WAN architecture? (Choose two.)

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

An engineer working for a service provider with an employee ID: 4863:43:939 must design a solution to provide remote connectivity over the public internet. The design must:

securely connect multiple remote sites to the central site

provide redundant paths to the central site

allow auto path selection based on failure and connection quality

support IP multicast

minimal configuration at remote sites

Which solution must the engineer choose?

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 VPN solution for a company that has multiple branches connecting to a main office. What are two advantages of using DMVPN instead of IPsec tunnels to accomplish this task? (Choose

two.)

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?

Refer to the exhibit. An engineer must ensure that the QoS design guarantees bandwidth for the applications, and an application can request a particular type of service to support its delay requirements. Which solution must the engineer select?

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

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

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?

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?

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

An engineer must design an addressing plan for a small business using a single /24 network. Each department must have its own subnet. Drag and drop the subnets from the left onto the departments requirements that they fulfill on the right. Not all options are used.

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?

An engineer must design a QoS solution for a customer. The network currently supports data only, but the

customer will roll out VoIP and IP video in conjunction with the new QoS solution. The engineer plans to use

DiffServ. To ensure priority for voice services, which model must the design include?

A company is planning to open two new branches and allocate the 2a01:c30:16:7009::3800/118 IPv6 network for the region. Each branch should have the capacity to accommodate maximum of 200 hosts. Which two networks should the company use? (Choose two.)

Which feature minimizes TLOC connections and reduces strain on the vSmart controller in an SD-WAN architecture?

An engineer is designing a BGP network for a large customer. To permit efficient scaling, the BGP domain is split into clusters. Which peering solution should be used between the route reflectors in different clusters for the BGP routes to be propagated appropriately?

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?

In a cisco SD-Access brownfield deployment scenario, which configuration deployment must be taken with Cisco DNA center?

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?

What is the purpose of service routes in OMP updates?

Refer to the exhibit. The connection between SW2 and SW3 is fiber and occasionally experiences unidirectional link failure. An architect must optimize the network to reduce the change of layer2 forwarding loops when the link fails. Which solution should the architect include?

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

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

Which node performs the LISP Map-Server and Map-Resolver functions in the Cisco SD-Access network architecture?

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

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

Prior to establishing full-mesh iPsec tunnels in a typical Cisco SD-WAN deployment, which mechanism do WAN Edge routers use to exchange Key information for data plane encryption?

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?

Refer to the exhibit. An architect designs a BGP policy for a customer that requires load sharing of the links that connect with the upstream service provider. The customer has these requirements: • The inbound traffic destined to network 10.1.1.0/24 must transit the R3-R1 link, and if the link fails, all inbound traffic must transit the R4-R2 link.

• The inbound traffic destined to network 10.1.2.0/24 must transit the R4-R2 link, and if the link fails, all inbound traffic should transit the R3-R1 link.

Which solution must the architect choose?

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?

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?

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

Refer to the exhibit. A network engineer with an employee ID: 4384:99:754 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?

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

An engineer must design a QoS solution for a customer that is connected to an ISP over a 1Gbps link with a 100Mbps CIR. The ISP aggressively drops all traffic received over which is causing numerous TCP retransmissions. The customer is not using any RTP applications but wants to maximize bandwidth usage up to the CIR. Which QoS solution engineer choose?

Which two overlay network design considerations must be made for a Cisco SD-Access network? (Choose two.)

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

Refer to the exhibit. An engineer must connect the IPv6 island to the IPv4-only network to provide IPv6 hosts access to file servers and DNS services in the IPv4 network. Which NAT should the engineer choose?

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

What is the purpose of a border node in a Cisco SD-Access fabric?

Which feature provides the capability for intra-VN traffic filtering and control within the Cisco SO-Access architecture?

An engineer is working with NETCONF and Cisco NX-OS based devices. The engineer needs a YANG model that supports a specific feature relevant only to Cisco NX-OS. Which model must the engineer choose?

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?

A network engineer prepares a script to configure a loopback interface with IP address 172.16.15.12/32. To comply with the company security policies, 'Content-type':

‘application/yang-data+json‘ is added to the script. Connection to the network devices must be secured. Which code snippet must the network engineer use to meet this requirement?

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)

B)

C)

D)

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

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?

At which layer does Cisco Express Forwarding use adjacency tables to populate addressing information?

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

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)

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?

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

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

An engineer working for a service provider with an employee ID 4598.48.606 prepared several designs for a traditional campus network. The design must allow the deployment on the same VXLAN to any switch at the access layer and must support:

Fast convergence

High availability

Resilience

Which design must be selected?

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

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

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?

Which two functions are provided by the Cisco SD-WAN orchestration plane? (Choose two.)

A customer is undergoing a WAN re-architecture and wants to design QoS policies for remote sites that have low bandwidth. What must be considered to have CBWFQ configured in the parent and child policies in an end-to-end QoS design?

A company's security policy requires that all connections between sites be encrypted in a manner that does not

require maintenance of permanent tunnels. The sites are connected through a private MPLS-based service that

uses a dynamically changing key and spoke-to-spoke communication. Which type of transport encryption must

be used in this environment?

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?

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?

Exhibit:

Refer to the exhibit. An engineer is designing a Layer 2 campus network. The design must support fast convergence and leverage as much bandwidth as possible between layers. Distribution switches do support VSS; unfortunately, not all routing protocols are available for use due to license limitations. Which solution must the engineer choose?

What is one function of the vSmart controller in an SD-WAN deployment?

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

Which feature is used to optimize WAN bandwidth of IGMP network traffic among WAN Edge routers in the

same VPN?

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?

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

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 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?

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

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 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?

Refer to the exhibit. Due to budget constraints, a customer decided to purchase WAN routers with one LAN and one WAN interface per device. There is a requirement to connect the three sites to ensure high availability without buying additional WAN links. Which design deployment must the customer choose?

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

Which security functionality does gRPC provide?

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?

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?

Refer to the exhibit.

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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?

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

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?