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

A customer with an IPv4 only network topology wants to enable IPv6 connectivity while preserving the IPv4 topology services. The customer plans to migrate IPv4 services to the IPv6 topology, then decommission the IPv4 topology. Which topology supports these requirements?

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

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?

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

A network engineer is redesigning a company's QoS solution. The company is currently using IP Precedence, but the engineer plans to move to DiffServ. It is important that the new solution provide backward compatibility with the current solution. Which technology should the design include?

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.)

A company with multiple service providers wants to speed up BGP convergence time in the event a failure occurs with their primary link. Which approach achieves this goal and does not impact router CPU utilization?

A network engineer must segregate three interconnected campus networks using IS-ISrouting. 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 design consideration must be made when dual WAN Edge routers are deployed at a branch site?

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.

Which component is part of the Cisco SD-Access overlay architecture?

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

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.)

A company needs to increase access port capacity on one floor of a building. They want to leverage the existing catalyst access switch. There is no problem with uplink bandwidth capacity. However, no additional uplinks can be added because no ports are available on the distribution switches. Which solution must the company choose to provide additional access ports?

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

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)

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 is an advantage of designing an out-of-band network management solution?

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?

In an SD-WAN architecture, which methods are used to bootstrap a vEdge router?

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

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

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?

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

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?

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.)

An engineer is designing a QoS policy that queues excess packets for later transmission. Which mechanism must be included in the design?

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

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

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?

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?