Free 300-420 Sample Questions — Designing Cisco Enterprise Networks (ENSLD)

Free 300-420 sample questions for the Designing Cisco Enterprise Networks (ENSLD) exam. No account required: study at your own pace.

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Question 1

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?

  • A. L2VPN VPLS-VPWS
  • B. L2VPN EVPN
  • C. IPv4 unicast
  • D. VPNv4
Show Answer
Correct Answer:
B. L2VPN EVPN
Question 2

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?

  • A. /24 prefixes for data from 10.0.0.0/15 and /24 prefixes for voice from 172.16.0.0/15
  • B. /24 prefixes for data from 10.0.0.0/8 and /24 prefixes for voice from the next contiguous /24 prefix per site
  • C. /25 prefixes for data from 10.0.0.0/8 end /25 prefixes for voice from the next contiguous /25 prefix per branch
  • D. /24 prefixes for data from 10.0.0.0/8 and /24 prefixes for voice from 172.16.0.0/12
Show Answer
Correct Answer:
B. /24 prefixes for data from 10.0.0.0/8 and /24 prefixes for voice from the next contiguous /24 prefix per site
Question 3

A company wants to deploy IPv6 within its existing network infrastructure. All current infrastructure equipment supports IPv6, and the company wants a migration strategy that must not require purchasing additional equipment. The plan must keep operational management costs low, support IPv6 multicast, and allow applications to migrate using DNS. Which strategy must the company choose?

  • A. hybrid ISATAP tunnel model
  • B. hybrid manual tunnel model
  • C. dual-stack model
  • D. service block model
Show Answer
Correct Answer:
C. dual-stack model
Question 4

An engineer is designing a multicast network for a company specializing in VoD content. Receivers are across the Internet, and for performance reasons, the multicast framework must be close to the receivers within each AS. For high availability, if the sources in one AS are no longer available, the receivers of that AS must be able to receive the VoD content from the sources in another AS. Which feature must the design include?

  • A. SSM
  • B. anycast RP
  • C. bidirectional PIM
  • D. MSDP
Show Answer
Correct Answer:
D. MSDP
Question 5

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 resource utilization, while still allowing for full connectivity to the rest of the network?

  • A. not so stubby
  • B. totally not so stubby
  • C. totally stubby area
  • D. stubby area
Show Answer
Correct Answer:
C. totally stubby area
Question 6

Which information update is earned by OMP and enables the Cisco SD-WAN to build a secure overlay fabric on top of any public or private transport without regard for the actual link IP?

  • A. TLOC
  • B. RLOC
  • C. DTLS
  • D. LISP PITR
Show Answer
Correct Answer:
A. TLOC
Question 7

What are two advantages of the Cisco SD-WAN technology? (Choose two.)

  • A. easier deployment
  • B. improved application experience
  • C. optimized cloud connectivity
  • D. consistent connectivity
  • E. proactive network management
Show Answer
Correct Answer:
  • B. improved application experience
  • C. optimized cloud connectivity
Question 8

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?

  • A. expedited forwarding
  • B. assured forwarding
  • C. class selector code points
  • D. default per-hop behavior
Show Answer
Correct Answer:
C. class selector code points
Question 9

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?

  • A. Use a single IP address to create overload NAT
  • B. Use a single IP address to create a static NAT entry
  • C. Build one-to-one NAT translation for every user that needs access
  • D. Re-IP overlapping address space in the acquired company
Show Answer
Correct Answer:
A. Use a single IP address to create overload NAT
Question 10

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?

  • A. Management Plane Protection
  • B. dedicated management console connection per device
  • C. terminal server
  • D. dedicated management VRF connection per device
Show Answer
Correct Answer:
D. dedicated management VRF connection per device
Question 11

A customer plans to adopt distributed QoS in their enterprise WAN. The policy must allow for individual packet marking according to the type of treatment required and for forwarding based on hop-by-hop treatment locally defined on each device. Which technology must the customer select?

  • A. CBWFQ
  • B. LLQ
  • C. Diffserv
  • D. IntServ
Show Answer
Correct Answer:
C. Diffserv
Question 12

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

  • A. fabric device that connects wired endpoints to the SD-Access fabric
  • B. map system that manages endpoint to device relationships
  • C. fabric device that connects APs and wireless endpoints to the SD-Access fabric
  • D. map system that manages External Layer 3 networks
Show Answer
Correct Answer:
B. map system that manages endpoint to device relationships
Question 13

An engineer is designing a PIM Anycast RP solution between two data centers. The design must ensure that RP1 in DC1 and RP2 in DC2 inform each other about specific sources that have joined locally. Which solution must the engineer choose?

  • A. Provision the RPs on the same IP subnet and extend the subnet at Layer 2 between data centers
  • B. Enable MSDP between RPs using separate unique loopback interfaces
  • C. Enable MSDP between RPs using the configured Anycast RP address
  • D. No action is required because PIM registers from the source will, by default, reach each RP
Show Answer
Correct Answer:
B. Enable MSDP between RPs using separate unique loopback interfaces
Question 14

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 classify and mark traffic traveling between branch sites?

  • A. CBWFQ with DSCP AF2
  • B. LLQ with DSCP EF
  • C. CBWFQ with DSCP AF3
  • D. LLQ with DSCP AF4
Show Answer
Correct Answer:
C. CBWFQ with DSCP AF3
Question 15

What statement is true regarding the current time in Enterprise Networking history?

  • A. advent of IoT
  • B. technology pace of change
  • C. pervasive use of mobile devices
  • D. advent of cloud computing
Show Answer
Correct Answer:
A. advent of IoT
Question 16

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

  • A. LAN automation for deployment
  • B. Layer 3 to the access design
  • C. Reduce subnets and simplify DHCP management
  • D. Dedicated IGP process for the fabric
  • E. Avoid overlapping IP subnets
Show Answer
Correct Answer:
  • C. Reduce subnets and simplify DHCP management
  • E. Avoid overlapping IP subnets
Question 17

In Cisco SD-Access, virtual networks create segmentation that allows for separation of users and resources. How is this type of segmentation described?

  • A. stretched
  • B. micro
  • C. macro
  • D. inter-VN
Show Answer
Correct Answer:
C. macro
Question 18

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

  • A. to abstract IP-based connectivity from physical connectivity
  • B. to emulate LAN segments to transport Layer 2 frames over a Layer 3 network
  • C. to establish physical connectivity between switches and routers
  • D. to provide virtualization by encapsulating network traffic over IP tunnels
Show Answer
Correct Answer:
C. to establish physical connectivity between switches and routers
Question 19

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. The route reflectors should be made dents of each other
  • B. The route reflectors should be nonclients with regards to each other
  • C. The route reflectors should not have any kind of BGP peering
  • D. The route reflectors should have peering through another nonclient router
Show Answer
Correct Answer:
B. The route reflectors should be nonclients with regards to each other
Question 20

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

  • A. Subnets must be reduced to decrease latency
  • B. Up to six control planes are supported
  • C. The default MTU should be increased
  • D. unified policy must be used
Show Answer
Correct Answer:
C. The default MTU should be increased

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