300-420 Designing Cisco Enterprise Networks (ENSLD) Questions and Answers

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.)

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. 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?

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

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.)

Exhibit:

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?

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?

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?

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 do endpoints inside an SD-Access network reach resources outside the fabric?

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

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

same VPN?

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?

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

When expanding an existing Cisco SD-Access network, in addition to the control plane, which two device roles are needed to create an additional fabric site? (Choose two.)

An engineer is designing a BGP solution supporting a VXLAN environment over a Layer 3 IPv4 network fabric with these requirements

provide Layer 2 adjacency

allow VM migration of workloads between sites

IGP is OSPF

Which BGP address family must the engineer choose?

Which design element should an engineer consider when multicast is included in a Cisco SD-Access architecture?

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?

What is a benefit of using VRRPv3 as compared to VRRPv2?

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

Refer to the exhibit. A customer has two eBGP peerings from a single CE router toward two service providers. The customer has hired an architect to design a solution to ensure certain traffic enters the customer's network through interface g¡g0/0. Which solution must the architect include in the design?

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?

Refer to the exhibit. A network architect is preparing a network design based on the EIGRR Routers are connected using a cat6a cable type and the inter-router connection speed is limited to 10 Mbps due to distance. During the pilot phase, a DUAL-3-SIA error message is visible. Which action must the engineer take to create a stable design?

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

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

What is the function of the multicast Reverse Path Forwarding check?

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?

Refer to the exhibit. A company specializing in VoD content creation has two offices in a separate multicast domain connected by a WAN link. BGP communication has been established between the offices. Clients are inside the LAN in each office. In AS5373. R2 has been selected as RP. What must the network architect design to deliver VoD content to clients in AS65773?

Which feature of Cisco SD-WAN Secure Direct Cloud Access divides user traffic into different zones and VPNs or VRFs?

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?

What are two benefits of designing an SD-WAN network fabric with direct Internet access implemented at

every site? (Choose two.)

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

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

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?

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?

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 is an advantage of using model-driven telemetry in the network?

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?

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?

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

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

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?

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.)

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 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?

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?

What is a feature of the SaaS subscription model?

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?

Drag and drop the descriptions from the left onto the categories they apply to on the right.

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

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

Refer to the exhibit. An engineer must design an automatic failover solution. The solution should allow HSRP to detect a WAN 1 failure and initiate an automatic failover, making router R2 the active HSRP router. Which two solutions should the engineer choose? (Choose two.)

When is it advisable to provide dedicated control plane nodes within a Cisco SD-Access design?

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

Refer to the exhibit. An engineer is designing an OSPF network for a client. Requirements dictate that the routers in Area 1 should receive all routes belonging to the network, including EIGRP, except the ones originated in the RIP domain. Which action should the engineer take?

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 architect is designing a hierarchical ISIS solution for a customer with these requirements:

Routers will double In all areas within the next 24 months.

Link flaps within areas 20 and 30 must not impact the backbone area.

Traffic originating from A201 and A302 routers must connect to application servers in the backbone.

Which design must the architect select?

Refer to the exhibit. An architect is developing a solution to consolidate networks while retaining device redundancy. The routing protocol for the WAN routers must be open standard, ensure high availability, and provide the fastest convergence time. Which solution must the design include?

A client is moving to Model-Driven Telemetry and requires periodic updates. What must the network architect consider with this design?

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

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 method will filter routes between EIGRP neighbors within the same autonomous system?

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 network engineer must design a multicast solution to prevent the spoofing of multicast streams and ensure efficient bandwidth utilization. The network will be merged with another multicast domain in the future, and the merge must require minimum effort. Which two solutions meet the customer requirements? (Choose two.)

An engineer is designing a QoS solution for a customer The customer's internet connection has a bandwidth of 10 Mbps. The design must ensure that traffic bursts of data do not exceed the bandwidth of the connection and that received traffic does not starve out business-critical traffic Which solution must the engineer choose?

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

Refer to the exhibit. An engineer proposed this solution for a company that requires a loop-free. Layer 2 network design. The network will run 802.1W, and all links will be 1 Gbps. If all interfaces are up as point- to-point adjacencies, what are the expected port end states based on the design?

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.

In PIM sparse mode, if an RPF check is successful on a multicast-enabled device, what happens to the multicast packet?

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?

Refer to the exhibit. Which method must an architect use to provide connectivity between the mail servers?

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 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?

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.)

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

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?

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

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?

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?

How are wireless endpoints registered in the HTDB in a Cisco SD-Access architecture?

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

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

An architect must develop a campus network solution that includes:

logically segmented and isolated networks

ability to communicate between network segments when required

support for overlapping IP addresses

widely available technologies to avoid purchasing specialized equipment

Which solution must the architect select?

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?

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?

An engineer is designing an IPv4 addressing plan for an enterprise with 1000 branches. Each branch requires a prefix for data and a prefix for voice. Each prefix must accommodate up to 128 hosts, and prefixes must facilitate summarization at aggregation points in the network. The security team requires a simple method for identifying voce prefixes. Which allocation does the engineer recommend from the RFC1918 address space?

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?

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

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. 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?

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?

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?

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 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?