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Exam Implementing Cisco Service Provider Next-Generation Core Network Services (SPCORE)
Number 642-887
File Name Cisco.PracticeDumps.642-887.2018-02-13.1e.184q.vcex
Size 5.31 Mb
Posted February 13, 2018
Downloaded 7



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Demo Questions

Question 1
Which three conditions can occur when metering traffic using a dual token bucket traffic policing QoS mechanism on Cisco routers? (Choose three.)

  • A: conform
  • B: pass
  • C: violate
  • D: exceed
  • E: burst
  • F: matched



Question 2
What is the correct formula for determining the CIR?

  • A: CIR = Bc/Tc
  • B: CIR = Bc x Tc
  • C: CIR = Tc/Bc
  • D: CIR = Bc + Be
  • E: CIR = Tc/(Bc+Be)
  • F: CIR = (Bc+Be)/Tc



Question 3
DS-TE implementations on Cisco routers support which bandwidth pool(s) and class type(s)?  (Choose two.)

  • A: global pool only
  • B: subpool only
  • C: global pool and subpool
  • D: class-type 0 only
  • E: class-type 1 only
  • F: class-type 0 and class-type 1



Question 4
Which field in the MPLS shim header is used to support different QoS markings?

  • A: IP precedence
  • B: DSCP
  • C: EXP
  • D: ToS
  • E: S
  • F: Label



Question 5
On a Cisco IOS XR router, which mechanism protects the router resources by filtering and policing the packets flows that are destined to the router that is based on defined flow-type rates?

  • A: LLQ
  • B: LPTS
  • C: Committed Access Rate
  • D: Control Plane Policing
  • E: Management Plane Protection
  • F: NetFlow
  • G: ACL



Question 6
When configuring LLQ (strict priority queue) on a traffic class using the Cisco IOS XR priority command on a Cisco ASR9K router, which additional QoS command is required for this traffic class?

  • A: shape
  • B: police
  • C: random-detect
  • D: bandwidth



Question 7
On the Cisco ASR9K router, when using the bandwidth command to specify the minimum guaranteed bandwidth to be allocated for a specific class of traffic, what will be used as the queuing algorithm?

  • A: custom queuing
  • B: CBWFQ
  • C: WFQ
  • D: FIFO
  • E: priority queuing



Question 8
When implementing MPLS DS-TE on Cisco IOS XR routers, all aggregate Cisco MPLS TE traffic is mapped to which class type by default?

  • A: class-type 0 (bandwidth global pool)
  • B: class-type 1 (bandwidth subpool)
  • C: class-type 2 (bandwidth priority)
  • D: class type class-default (bandwidth best-effort)



Question 9
On the Cisco IOS XR, which MQC configuration is different than on the Cisco IOS and IOS XE?

  • A: On the Cisco IOS XR, WRED can only be applied in the output direction.
  • B: On the Cisco IOS XR, marking can only be applied in the input direction.
  • C: On the Cisco IOS XR, LLQ can be applied in the input or output direction.
  • D: On the Cisco IOS XR, LLQ can use up to four priority queues: level 1, level 2, level 3, and level 4.



Question 10
On Cisco routers, how is hierarchical QoS implemented?

  • A: Within the parent policy, reference another child policy using the policy-map command.
  • B: Within the child policy, reference another parent policy using the policy-map command.
  • C: Use the policy-map command within a service-policy to implement nested policy-maps.
  • D: Within the parent policy-map, reference another child policy-map using the service-policy command.









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