Nokia 4A0-107 Online Practice Questions and Exam Preparation

Nokia 4A0-107 Online Questions & Answers

• Question 11:

  Which of the following statements about the DiffServ and IntServ QoS models is FALSE?

  A. IntServ uses a protocol like RSVP to provide QoS guarantees on a per-flow basis.
  B. DiffServ groups multiple microflows into bigger streams called macro flows.
  C. Intserv requires that network routers allocate resources for thousands of individual flows.
  D. Diffserv classifies packets into forwarding classes only at the first network hop.
  D. Diffserv classifies packets into forwarding classes only at the first network hop.

• Question 12:

  Which action should be taken to ensure that packets do not use the shared buffer space when put into a queue?

  A. Set the queue's CBS to 0
  B. Set the queue's MBS equal to the CBS
  C. Set the queue's high-priority-only equal to the MBS
  D. Set the queue's MBS to 0
  E. Set the queue's high-priority-only to 0
  B. Set the queue's MBS equal to the CBS

• Question 13:

  

  According to the configuration shown above, which of the following about the classification and marking of self-generated BGP traffic is TRUE?

  A. It will be marked as DSCP BE and classified into forwarding class BE.
  B. It will be marked as DSCP NC1 and classified into forwarding class BE.
  C. It will be marked as DSCP NC1 and classified into forwarding class NC.
  D. It will be marked as DSCP NC1 and classified into forwarding class AF.
  D. It will be marked as DSCP NC1 and classified into forwarding class AF.

• Question 14:

  Which of the following statements about the QoS treatment of self-generated traffic in the Nokia 7750 SR is FALSE?

  A. All self-generated traffic is assigned into forwarding class NC by default.
  B. Ingress self-generated traffic is stored in CPM queues and egress self-generated traffic is stored in IOM queues.
  C. The self-generated packets will be marked with a default DSCP value.
  D. The self-generated packets will be marked with default EXP bits.
  C. The self-generated packets will be marked with a default DSCP value.

• Question 15:

  Click the exhibit button below. Given that the slope-policy (below) has been enabled and applied on a network port, which of the following statements are TRUE? (Choose three) A. All out-of-profile traffic will be dropped before any in-profile is dropped.

  

  B. The time average factor of 0 will discard all packets arriving in the shared buffer pool.
  C. When the shared buffer utilization reaches 51%, in-profile packets might be dropped.
  D. The highest probability with which an out-of-profile packet can be dropped is 20%.
  E. When an in-profile packet arrives and the shared buffer utilization is at 69%, the packet will have approximately a 60% likelihood of being discarded.
  C. When the shared buffer utilization reaches 51%, in-profile packets might be dropped.
  E. When an in-profile packet arrives and the shared buffer utilization is at 69%, the packet will have approximately a 60% likelihood of being discarded.

• Question 16:

  Which following statements about the four-step QoS process (classification, queuing, scheduling, and marking/remarking) executed for every packet entering a Nokia 7750 SR is TRUE?

  A. The process happens only before the packet goes through the switching fabric.
  B. The process happens only before the packet goes onto the egress port.
  C. Marking/remarking the packets is for future classification.
  D. Marking/remarking the packets will occur right after classification of the packet.
  D. Marking/remarking the packets will occur right after classification of the packet.

• Question 17:

  Which of the following statements about burst-limit of a queue is FALSE?

  A. Burst-limit sets a limit on the maximum burst of packets transmitted during each scheduler visitation time.
  B. Proper configuration of the burst-limit can prevent packet drops on the downstream nodes resulting from traffic bursts.
  C. The lower the configured burst limit value, the lower the burst allowed to enter the queue.
  D. If the burst-limit is not configured, a default burst-limit value will be used by the queue.
  D. If the burst-limit is not configured, a default burst-limit value will be used by the queue.

• Question 18:

  Which of the following QoS functions does the slope-policy perform?

  A. Classification
  B. Marking
  C. Queuing
  D. Congestion management
  E. Scheduling
  D. Congestion management

• Question 19:

  What can be learned from the output of the command "show pools 1/2/2 network-egress" on the GigE port?

  

  A. All incoming packets belonging to forwarding class "l2" are stored in the reserved buffer space.
  B. All incoming packets belonging to forwarding class "af" are stored in the reserved buffer space.
  C. All incoming packets belonging to forwarding class "l1" are stored in the reserved buffer space.
  D. In-profile packets in the shared buffer space are being dropped.
  A. All incoming packets belonging to forwarding class "l2" are stored in the reserved buffer space.

• Question 20:

  Click the exhibit button below. Given the scheduler-policy (below), which of the following can be done to guarantee that the best-effort traffic receives its configured CIR value?

  

  A. Change the CIR-level value for the best-effort queue to 8.
  B. Do not change anything; it is already guaranteed to receive its CIR
  C. Change the CIR-level value for the best-effort queue to 1.
  D. Change the CIR-weight value of the AF queue to 0.
  A. Change the CIR-level value for the best-effort queue to 8.
  D. Change the CIR-weight value of the AF queue to 0.