Nokia Nokia Certifications 4A0-107 Questions & Answers

• Question 81:

  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.

  Correct Answer: A

• Question 82:

  Which of the following statements is a characteristic of a CFHP arbiter?

  A. An arbiter can adjust the CIR of its child policers.

  B. An arbiter rate-limits the collective output of several policers towards each egress FFPC.

  C. An arbiter can adjust the bandwidth assigned to its child arbiters and child policers.

  D. An arbiter does not need to honor the configurations of its child policers.

  Correct Answer: C

• Question 83:

  Which of the following statements about the token buckets of a policer is FALSE?

  A. The CIR has no influence on the forwarding rate of the policer traffic.

  B. The CIR influences whether a packet is considered high-profile or low-profile.

  C. The policer discards all incoming packets when PIR bucket reaches the MBS level.

  D. PIR bucket forwards packets that arrive with rates above PIR as out-of-profile.

  Correct Answer: A

• Question 84:

  According to the SAP-ingress QoS policy shown, which packets have a higher priority to enter queue 2?

  

  A. Packets marked with dscp = af33

  B. Packets marked with dot1p = 4

  C. All packets mapped to queue 2 have the same priority to enter this queue.

  D. There are no packets mapped to queue 2.

  Correct Answer: A

• Question 85:

  On the Nokia 7750 SR, what is the maximum number of ingress queues that a single network queue policy can support in a VPLS?

  A. 8

  B. 16

  C. 32

  D. 48

  Correct Answer: C

• Question 86:

  For which of the following queues does a Nokia 7750 SR allocate a separate hardware queue per each destination fast forward path complex (FFPC)?

  A. An egress unicast queue defined in a network queue policy

  B. An ingress unicast queue defined in a SAP-ingress policy

  C. An ingress multipoint queue defined in a SAP-ingress policy

  D. An ingress multipoint queue defined in a network queue policy

  Correct Answer: B

• Question 87:

  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.

  Correct Answer: A

• Question 88:

  A profile-mode queue is configured with MBS = 100 KB, CBS = 50 KB and High-Priority-Only = 40%. Assume there is no CBS overbooking, and the slope-policy is disabled. If the current queue depth is 70 KB, what will happen to an out-of- profile packet when it is transmitted to the queue?

  A. It will be stored in the reserved buffer space and remain out-of-profile.

  B. It will be stored in the reserved buffer space and become in-profile.

  C. It will contend for shared buffer space with packets from other queues.

  D. It will be discarded because the high-priority-only threshold has been reached.

  Correct Answer: A

• Question 89:

  Which of the following statements about queue modes, and profile marking of packets when leaving a queue is FALSE?

  A. Profile-mode and priority-mode queues can only be configured on SAP ingress.

  B. For network egress, egress re-classification can change the profile marked at ingress.

  C. For SAP egress, the profile marked at ingress may change based on the scheduling loop.

  D. For network ingress, the network policy can classify the packet as either in-profile, or out-of-profile.

  Correct Answer: C

• Question 90:

  Which of the following is NOT a reason for configuring a slope policy on a queue?

  A. To have control over the amount of the low priority packets that enter the queue.

  B. To control any traffic flowing through the shared buffer space of the queue.

  C. To limit the number of the TCP sessions that go into slow start during congestion.

  D. To force the TCP algorithm to increase its transmission window upon detecting a congestion.

  Correct Answer: D