Data Center Design, Specialist (JNCDS-DC) v1.0

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Exam contains 71 questions

What are two components of a class-of-service (CoS) switching configuration? (Choose two.)

  • A. forwarding tables
  • B. bandwidth
  • C. port speed
  • D. forwarding class


Answer : BD

Which two characteristics describe the deployment of high-density chassis switches in a data center? (Choose two.)

  • A. In EoR deployments, the switches are consolidated in one location.
  • B. The switches consume a great deal of power, cooling, and space.
  • C. In ToR deployments, the switches provide more port connections, but with lower speeds.
  • D. More switches are often needed to accommodate the number of server connections.


Answer : BD

Your data center uses an Ethernet fabric solution for the infrastructure switches.
You must design a redundancy solution that addresses how the servers connect to the members of the Ethernet fabric. Which two statements are true in this scenario? (Choose two.)

  • A. It is necessary to use MC-LAG.
  • B. You should connect each server to one member with a two-interface LAG.
  • C. You should connect each server to two different members.
  • D. It is not necessary to use MC-LAG.


Answer : CD

You are asked to provide a data center design proposal. The customer wants each rack to be managed as a single unit with the shortest possible cable lengths.
Which deployment model meets these requirements?

  • A. top of rack
  • B. middle of rack
  • C. middle of row
  • D. end of row


Answer : B

Which data center fabric architecture independently supports the greatest quantity of hosts and servers?

  • A. Virtual Chassis Fabric
  • B. Layer 3 Clos
  • C. QFabric system
  • D. Junos Fusion


Answer : B

From a network management perspective, a Virtual Chassis consisting of five physical switches will appear as how many devices?

  • A. 0
  • B. 1
  • C. 2
  • D. 5


Answer : B

A customer asks you if they should implement nonstop active routing (NSR) in some cases to replace graceful restart in their data center.
In this scenario, which two statements are true? (Choose two.)

  • A. NSR saves routing protocol information by running the routing protocol process (rpd) on the backup Routing Engine.
  • B. NSR is self-contained and does not rely on helper routers (or switches) to assist the routing platform in restoring routing protocol information.
  • C. NSR accounts for large and small traffic flows to ensure coherent forwarding path selection during failover.
  • D. NSR delivers TCP/UDP stream status reducing control plane stress for other networking devices through concatenated announcements from the routing protocol process (rpd)


Answer : AB

You are designing a DCI strategy. You must provide a solution that meets the requirements shown below:
-sub 50 ms failover to alternate path
-supports L2 and L3 VPNs
-supports traffic engineered paths
Which technology would satisfy the requirements?

  • A. MPLS
  • B. GRE
  • C. BGP
  • D. IPsec


Answer : A

You need a security management solution for your data center that will support centralized network visibility and control, J-Flow collection from existing perimeter devices, and SIEM. In this scenario, which two products should you choose for your data center design? (Choose two.)

  • A. vSRX
  • B. Security Director
  • C. JSA
  • D. Sky ATP


Answer : AC

You plan to deploy a set of SRX Series devices in an active/active chassis cluster with an active/active network infrastructure.
Which two statements are true in this scenario? (Choose two.)

  • A. This deployment scenario is recommended when firewall services are used extensively for east-west traffic.
  • B. End-host traffic is services through one SRX node during non-failure conditions.
  • C. This deployment scenario is recommended when firewall services are used extensively for north-south traffic.
  • D. End-host traffic is serviced through both SRX nodes during non-failure conditions.


Answer : AD

You are re-designing a traditional multitiered data center into a modern spine-and-leaf data center architecture. In this scenario, which two tiers are collapsed?
(Choose two.)

  • A. distribution
  • B. WAN
  • C. access
  • D. core


Answer : AD

You are designing a Junos-based Ethernet Fabric for a data center that has a combination of 60 EX Series and QFX Series devices.
In this scenario, which solution would you choose?

  • A. Junos Fusion Provider Edge
  • B. Virtual Chassis
  • C. Junos Fusion Data Center
  • D. Virtual Chassis Fabric


Answer : D

How many inches does one RU equal?

  • A. 1.000
  • B. 1.251
  • C. 1.527
  • D. 1.752


Answer : D

A customer is using EVPN to maximize their Data Center Interconnect and provide a stretched Layer 2 network to support VM mobility. What are two benefits in this scenario? (Choose two.)

  • A. Load balancing is used across the WAN per flow
  • B. Layer 2 MAC tables are populated using the control plane
  • C. Load balancing is used across the WAN per packet
  • D. Layer 2 MAC tables are populated using the data plane


Answer : AB

Which two statements describe the Contrail vRouter? (Choose two.)

  • A. It is forwarding plane that runs software on a virtualized server.
  • B. It extends the network form physical routers and switches into an overlay network hosted in virtual server.
  • C. It is responsible for providing the management, control, and analytics functions of the virtualized network.
  • D. It provides the logically centralized control plane and management plane of the system.


Answer : AC

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Exam contains 71 questions

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