Nokia Nokia Certifications 4A0-107 Questions & Answers

• Question 41:

  If packets egressing a SAP do not match any criteria defined in the SAP-egress policy, which forwarding class will these packets be assigned to?

  A. The default forwarding class defined in the SAP-egress policy.

  B. The forwarding class inherited from network ingress classification.

  C. Best Effort.

  D. If there is no match, packets will be dropped.

  Correct Answer: A

• Question 42:

  

  In the image shown above, the network QoS policy is applied properly to a Nokia 7750 SR. An MPLS packet with dot1p=1, EXP=4, and DSCP=AF is received. Which forwarding class and profile is assigned to this packet?

  A. EF, in

  B. H1, out

  C. BE, out

  D. L1, in

  Correct Answer: D

• Question 43:

  In a Nokia 7750 SR, which of the following QoS policies CANNOT include packet classification criteria?

  A. SAP-ingress

  B. SAP-egress

  C. Network-queue

  D. Network

  Correct Answer: B

• Question 44:

  

  In the image shown above, the SAP-ingress policy is applied properly to a Nokia 7750 SR. A packet is received from an IP address of 192.168.2.2 with DSCP set to AF. Which forwarding class and priority level is assigned to this packet?

  A. NC, low

  B. NC, high

  C. BE, low

  D. BE, high

  Correct Answer: C

• Question 45:

  In a Nokia 7750 SR, which of the following is a class type that is intended for non-real-time customer traffic that requires some committed bandwidth?

  A. Gold

  B. Assured

  C. High Priority

  D. Best Effort

  Correct Answer: C

• Question 46:

  What feature makes a traffic stream real-time?

  A. Its rate fluctuates rapidly with time.

  B. Its bandwidth requirements are high.

  C. Time between packets remains unchanged and end-to-end delay is kept to a minimum.

  D. All packets received are guaranteed to be delivered to the destination.

  Correct Answer: C

• Question 47:

  Why are the four QoS steps (classification, queuing, scheduling, and marking/remarking) executed twice for every packet entering a 7750 SR router?

  A. Once before going through each of the redundant switching fabrics.

  B. To protect against failure of either ingress or egress card.

  C. Once before going through the switching fabric, and once more before going onto the egress port.

  D. Once to decide if the packet is in-profile or out-of-profile, and once more to process the packet according to its profile.

  Correct Answer: C

• Question 48:

  Which of the following statements defines the committed information rate?

  A. It is the rate at which a traffic stream is offered to a queue.

  B. It is the rate at which packets are forwarded out of a queue.

  C. It is the minimum rate at which packets may be forwarded out of a queue.

  D. It is the maximum rate at which packets may be forwarded out of a queue.

  Correct Answer: C

• Question 49:

  Which of the following statements describes an advantage of the DiffServ QoS model over the IntServ QoS model?

  A. DiffServ reserves resources dynamically using the RSVP protocol.

  B. DiffServ only requires packets to be classified into forwarding classes at the first network hop.

  C. DiffServ provides granular differentiation and superior fairness because it processes traffic streams individually.

  D. DiffServ is more scalable it treats traffic streams as aggregates.

  Correct Answer: D

• Question 50:

  Which action does the packet remarking process perform?

  A. It determines the packet's forwarding class based on classification criteria

  B. It modifies the current packet's forwarding class to indicate promotion or demotion

  C. It sets the TOS, DSCP, EXP, or Dot1p field based on classification criteria

  D. It modifies the current TOS, DSCP, EXP, or Dot1p marking to indicate promotion or demotion

  Correct Answer: C