Free 4A0-107 Questions for Nokia 4A0-107 Exam

Question #1

It is necessary for Tier 1 schedulers to obtain bandwidth from a higher tier scheduler.

A. FALSE

B. TRUE

Discussion 0

Correct Answer: A Vote an answer

Question #2

Which of the following statements are TRUE regarding the remarking of packets arriving on the network interface whose ToS-marking-state is set to trusted and remarking enabled on network egress? (Choose two)

A. Native IP Packets will be remarked.

B. Packets associated with a VPRN service on an upstream node will not be remarked.

C. Native IP Packets will not be remarked.

D. Packets associated with an ES service on an upstream node will be remarked.

Discussion 0

Correct Answer: A,D Vote an answer

Question #3

Which of the following statements about scheduling on the Nokia 7750 SR is FALSE?

A. When using priority-mode queues, traffic marked as high-priority on ingress and scheduled in the above-CIR loop will be considered as out-of-profile at egress.

B. When using priority-mode queues, traffic marked as low-priority on ingress and scheduled in the above-CIR loop will be considered as in-profile at egress.

C. When using profile-mode queues, traffic marked as low-priority on ingress and scheduled in the above-CIR loop will be considered as out-of-profile at egress.

D. When using profile-mode queues, traffic marked as in-profile on ingress and scheduled in the above-CIR loop will still be considered as in-profile at egress.

Discussion 0

Correct Answer: B Vote an answer

Question #4

Click the exhibit button below. Given the scheduler-policy (below), how much bandwidth can the best-effort traffic receive (PIR and CIR) when the ingress rate of each queue is 10Mbps?

A. PIR = 1.25Mbps, CIR = 1.25Mbps

B. PIR = 10Mbps, CIR = 1Mbps

C. PIR = 5Mbps, CIR = 1.25Mbps

D. PIR = 4Mbps. CIR = 1Mbps

E. PIR = 1Mbps, CIR = 1 Mbps

Discussion 0

Correct Answer: E Vote an answer

Question #5

Which of the following is an example of something that CAN be done with hierarchical policing (CFHP) but CANNOT be done with standalone policers?

A. Rate-limiting the collective output of several policers towards each egress FFPC, while maintaining control of the maximum overall forwarding rate.

B. Putting packets in a buffer as they are received, and marking packets as in-profile or out-of-profile as they are removed from the buffer.

C. Limiting the maximum forwarding rate of each individual policer and, at the same time, marking, packets as in-profile or out-of-profile.

D. Rate-limiting the collective output of several policers, and to reallocate bandwidth that is not utilized by some policers to other policers that need to use it.

Discussion 0

Correct Answer: C Vote an answer

Question #6

Which of the following statements about CFHP policing hierarchy is FALSE?

A. A child policer can have a priority level from 0 to 10.

B. A tier 1 arbiter can be the parent of a policer.

C. Weight is used by a parent arbiter to allocate bandwidth among children of equal level

D. The root arbiter can be the parent of a tier 2 arbiter.

Discussion 0

Correct Answer: A Vote an answer

Question #7

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

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

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

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

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

Discussion 0

Correct Answer: C Vote an answer

Question #8

Which of the following statements about network QoS policies is FALSE?

A. Classification is performed with behavior-aggregate statements only.

B. Match criteria can be chosen from dot1p, DSCP, and EXP fields in the packet.

C. Classification rules must specify both an FC and a profile for the packets.

D. A network policy is applied at a physical port.

Discussion 0

Correct Answer: A Vote an answer

Question #9

How does a shaper rate-limit a traffic stream?

A. Packets with an average arrival rate higher than PIR are immediately dropped; conforming packets are forwarded at the same rate at which they arrive.

B. Packets that arrive in a burst are immediately dropped; packets that arrive with the proper in between space are immediately.

C. Packets are buffered on arrival and are forwarded at an average rate conforming with PIR, typically, with a reduced burstiness.

D. Packets with an average arrival rate higher than PIR are buffered for future processing; conforming packets are immediately forwarded.

Discussion 0

Correct Answer: D Vote an answer

Question #10

Which of the following are the minimum requirements needed to classify traffic marked with DSCP AF11, AF12, and AF13 into the AF forwarding class and provide fair treatment to the drop precedence settings?
(Choose three)

A. 1 queue

B. Profile mode queues

C. 3 queues

D. 3 forwarding classes

E. Priority mode queues

F. 1 forwarding class, with 3 subclasses

G. 1 forwarding class, with 2 subclasses

Discussion 0

Correct Answer: A,B,G Vote an answer

Question #11

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

A. The CIR bucket of a policer has two thresholds: CBS and HPO.

B. When a packet arrives, the PIR bucket depth is checked and the packet is discarded if this bucket is full.

C. The CIR bucket of a policer is the reserved portion of its PIR bucket.

D. Packets processed by the PIR bucket at an average rate above PIR will be forwarded as out-of-profile.

Discussion 0

Correct Answer: B Vote an answer

Question #12

Which of the following statements about configuring queues to use shared or reserved buffer space is FALSE?

A. When queues use shared buffer space, buffers are more efficiently utilized.

B. When a queue is not using its reserved portion, other queues can use it.

C. Queues that use reserved buffer space will have memory available for their reserved portion.

D. Using reserved buffer space prevents a queue from being starved of buffer resources by other queues.

Discussion 0

Correct Answer: B Vote an answer

Question #13

Packets arrive at the VPLS SAP on PE1 with DSCP marking of af11 and Dot1p of 2. According to the QoS policies applied at routers PE1, P, and PE2, what is the DSCP value of packets egressing router PE2? (All the SDPs are MPLS-encapsulated, and all interfaces are using their default trust states).

A. af21

B. af31

C. af23

D. af11

Discussion 0

Correct Answer: D Vote an answer

Free 4A0-107 Questions for Nokia Quality of Service 4A0-107 Exam as PDF & Practice Test Engine

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