Nokia 4A0-107 Online Practice Questions and Exam Preparation

Nokia 4A0-107 Online Questions & Answers

• Question 91:

  The SAP-ingress policy shown below is applied properly to a Nokia 7750 SR. A traffic stream is received from an IP address of 192.168.2.200 with DSCP and dot1p set to EF and 4, respectively. Which forwarding class and priority level is used for this traffic stream?

  

  A. FC H1, high
  B. FCH1, low
  C. FCAF, high
  D. FCAF, low
  A. FC H1, high

• Question 92:

  If traffic is destined to queue 5, which has a high-priority-only value of 0 in the network-queue policy, all out-of-profile packets will be dropped.

  A. TRUE
  B. FALSE
  B. FALSE

• Question 93:

  Which of the following are examples of metrics for QoS?

  A. Signal degradation, attenuation, line loss
  B. Latency, FIFO, WRED
  C. Delay, jitter, packet loss
  D. SNR, queue depth, latency
  E. Attenuation, dispersion, latency
  C. Delay, jitter, packet loss

• Question 94:

  If two queues complete for bandwidth in a hierarchical scheduler environment, which parameter is used by their parent scheduler to determine the priority with which each queue can use bandwidth above its committed rate?

  A. level
  B. cir-level
  C. weight
  D. cir-weight
  C. weight

• Question 95:

  An IOM3 card of a Nokia7750 SR is enabled with the default scheduler and the policy shown in the image is applied to an access port on this card. In which order will packets be scheduled out of the queues?

  

  A. Queue 3 within-CIR packets, then queue 4 within-CIR packets, then queue 3 and queue 4 above-CIR packets in round-robin.
  B. Queue 4 within-CIR packets, then queue 3 within-CIR packets, then queue 3 and queue 4 above-CIR packets in round-robin.
  C. Queue 3 within-CIR packets, then queue 4 within-CIR packets, then queue 3 above-CIR packets, and finally queue 4 above-CIR packets.
  D. Queue 4 within-CIR packets, then queue 3 within-CIR packets, then queue 4 above-CIR packets, and finally queue 3 above-CIR packets.
  B. Queue 4 within-CIR packets, then queue 3 within-CIR packets, then queue 3 and queue 4 above-CIR packets in round-robin.

• Question 96:

  According to the SAP-ingress QoS policy shown, which of the following statements about processing of the packets by policers 3 and 4 is TRUE?

  

  A. Policer 3 forwards packets as out-of-profile when its PIR bucket has 4000 tokens.
  B. Policer 3 starts discarding low-priority packets when its PIR bucket has at least 3000 tokens.
  C. Policer 4 forwards all its packets as out-of-profile.
  D. Policer 4 starts discarding low-priority packets when its PIR bucket has at least 3000 tokens.
  A. Policer 3 forwards packets as out-of-profile when its PIR bucket has 4000 tokens.

• Question 97:

  When we select the adaptation rule "min", how are the operational CIR/PIR rates of a queue calculated?

  A. The administrative PIR values are ignored and both operational rates are set to the minimum residual rate allowed by the hardware.
  B. The administrative PIR value is ignored and both operational rates are set to the administrative CIR value.
  C. They are chosen as the largest multiple of the hardware rate step that is less than or equal to the corresponding CIR/PIR administrative value.
  D. They are chosen as the smallest multiple of the hardware rate step that is greater than or equal to the corresponding CIR/PIR administrative value.
  D. They are chosen as the smallest multiple of the hardware rate step that is greater than or equal to the corresponding CIR/PIR administrative value.

• Question 98:

  Which of the following statements are TRUE regarding the PE device in a QoS enabled network? (Choose two)

  A. A device that provides no differentiation between customer traffic flows.
  B. A device that classifies and marks customer traffic.
  C. A device that uses MPLS EXP bits to differentiate between traffic flows.
  D. A device that creates macroflows towards the core from multiple customer sites.
  E. A device that passes macroflows while optionally changing QoS markings.
  B. A device that classifies and marks customer traffic.
  D. A device that creates macroflows towards the core from multiple customer sites.

• Question 99:

  Without_______, a customer's high priority traffic can be dropped before its low priority traffic.

  A. packet filtering
  B. prioritization of traffic flows
  C. least cost routing
  D. OAM functionality
  E. separation between the data plane and the control plane
  B. prioritization of traffic flows

• Question 100:

  A queue is configured with the following attributes:

  MBS = 10KB CBS = 5KB High-Priority-Only = 20%

  Assume that there is no CBS overbooking and that the slope-policy is disabled. If the current queue depth is 3KB, what will happen to an out-of-profile packet arriving at an egress queue?

  A. It will be queued in the reserved portion of the buffer pool and remain out-of-profile.
  B. It will be queued in the reserved portion of the buffer pool if there are no in-profile packets already in the queue.
  C. It will be queued in the reserved portion of the buffer pool and be in-profile.
  D. It will be queued in the shared portion of the buffer pool but contend for shared buffer space with packets from other queues.
  E. It will be queued in the shared portion of the buffer pool but may be dropped if the buffer utilization exceeds the start-average value of the low slope.
  A. It will be queued in the reserved portion of the buffer pool and remain out-of-profile.