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Free 4A0-107 Exam Braindumps
Nokia Quality of Service Questions 81–85 (page: 18)

Updated On: 9-Feb-2026
Page 18 of 48
PDF with 231 Questions

Which of the following statements regarding scheduling on the Nokia 7750 SR is TRUE? (Choose two)

  1. When using profile-mode queues, traffic that is marked as in-profile on ingress and scheduled in the above-CIR loop will still be considered as in-profile at egress.
  2. When an HQoS strategy using an egress port-scheduler has been deployed, Tier 1 receives its scheduling rates based on the amount of egress bandwidth available for each forwarding class.
  3. The greater the difference between PIR and CIR rates in a queue, the less likely a CIR will be provided.
  4. Packets scheduled out of high-priority queues in the default scheduler will have a lower chance of packet loss at the expense of incurring a higher probability of delay.
  5. When using priority-mode queues, traffic that is marked as in-profile on ingress and scheduled in the above-CIR loop will be considered as in-profile at egress.

Answer(s): A,C



Which of the following fields can be marked or remarked for frames belonging to a Layer 2 service?

  1. DSCP
  2. PREC
  3. Dot1p
  4. ToS
  5. Q-in-Q

Answer(s): C



Click the exhibit button below.



At router PE1, customer packets are arriving tagged with a dotlp value of 6 and marked with a DSCP value of EF.

Based on the configuration shown below for a VPLS service, what will be the DSCP and EXP marking for the packet egressing the network port on this PE router? (Choose two)

  1. The DSCP value will be set to af21.
  2. The DSCP value will be set to af23.
  3. The DSCP value will remain as ef.
  4. The EXP value, in the MPLS headers, will be set to 4.
  5. The EXP value, in the MPLS headers, will be set to 3.

Answer(s): C,E



Click the exhibit button below.



All interfaces are using their default trust states and MPLS is used as the transport tunnel. The SAP- ingress, SAP-egress, and network QoS policies have been configured as shown below. Assume that the default network-queue policy is used on each router.

At router PE 1, customer traffic is arriving marked with DSCP BE and tagged with a dot1p value of 3.

Based on the configuration shown below for the VPRN service, what will be the DSCP and dot1p marking for the packet egressing at router PE 2? (Choose two)

  1. The DSCP value will be set to af21.
  2. The DSCP value will be set to be.
  3. TheDSCPvaluewillbesettoaf23.
  4. The DSCP value will be set to af 12.
  5. Thedot1pvaluewillbesetto5.
  6. Thedot1pvaluewillbesetto2.
  7. The dot1p value will be set to 3.

Answer(s): D,E



When deploying an Nokia MPLS network with QoS, how are the EXP bits set?

  1. The first 3 bits of the DSCP value are copied directly into the EXP field on the first network egress.
  2. The EXP bits are set on the first network egress, based on a combination of the SAP-ingress classification and the network policy applied.
  3. The 3 priority bits are copied directly from the dot1p header into the EXP field of the first MPLS header.
  4. The EXP bits are set based on a default map that translates DSCP codes into internal forwarding classes on SAP-ingress.

Answer(s): A,B



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