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Nokia 4A0-107 Practice Test - Questions Answers, Page 23

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How many tiers of schedulers can be supported in hierarchical scheduling on the Nokia 7750 SR?
Which of the following CANNOT be used as external marking bits?
At which points can traffic be marked or remarked on the Nokia 7750? (Choose two)
Which parameter can be configured in a network ingress QoS policy?
Which of the following should be performed if a service provider does not want packets to make use of the shared buffer space when queued?
On the Nokia 7750 SR, what is the maximum number of ingress queues that a single network queue policy can support in a VPLS?
According to the SAP-ingress QoS policy shown, which packets have a higher priority to enter queue 2?
What can be learned from the output of the command ''show pools 1/2/2 network-egress'' on the GigE port?
Which of the following statements about queue modes, and profile marking of packets when leaving a queue is FALSE?
Which of the following about scheduling is TRUE?

Question 221

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Which of the following about scheduling is TRUE?

A.
HQoS schedulers cannot be children of an egress port-scheduler.
A.
HQoS schedulers cannot be children of an egress port-scheduler.
Answers
B.
HQoS schedulers provide a dynamic method of allocating scheduling resources to queues.
B.
HQoS schedulers provide a dynamic method of allocating scheduling resources to queues.
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C.
HQoS scheduler policies can be applied to an MDA to schedule network ingress traffic.
C.
HQoS scheduler policies can be applied to an MDA to schedule network ingress traffic.
Answers
D.
A scheduler policy applied to multiple SAPs within the same service will result in a single hardware scheduler operating across all SAPs within the service.
D.
A scheduler policy applied to multiple SAPs within the same service will result in a single hardware scheduler operating across all SAPs within the service.
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Suggested answer: D

Question 222

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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.
A.
Profile-mode and priority-mode queues can only be configured on SAP ingress.
Answers
B.
For network egress, egress re-classification can change the profile marked at ingress.
B.
For network egress, egress re-classification can change the profile marked at ingress.
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C.
For SAP egress, the profile marked at ingress may change based on the scheduling loop.
C.
For SAP egress, the profile marked at ingress may change based on the scheduling loop.
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D.
For network ingress, the network policy can classify the packet as either in-profile, or out-of-profile.
D.
For network ingress, the network policy can classify the packet as either in-profile, or out-of-profile.
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Suggested answer: C

Question 223

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

Question 224

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

A.
Packets marked with dscp = af33
A.
Packets marked with dscp = af33
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B.
Packets marked with dot1p = 4
B.
Packets marked with dot1p = 4
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C.
All packets mapped to queue 2 have the same priority to enter this queue.
C.
All packets mapped to queue 2 have the same priority to enter this queue.
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D.
There are no packets mapped to queue 2.
D.
There are no packets mapped to queue 2.
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Suggested answer: A

Question 225

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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
A.
8
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B.
16
B.
16
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C.
32
C.
32
Answers
D.
48
D.
48
Answers
Suggested answer: C

Question 226

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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
A.
An egress unicast queue defined in a network queue policy
Answers
B.
An ingress unicast queue defined in a SAP-ingress policy
B.
An ingress unicast queue defined in a SAP-ingress policy
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C.
An ingress multipoint queue defined in a SAP-ingress policy
C.
An ingress multipoint queue defined in a SAP-ingress policy
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D.
An ingress multipoint queue defined in a network queue policy
D.
An ingress multipoint queue defined in a network queue policy
Answers
Suggested answer: B

Question 227

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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.
A.
The CIR has no influence on the forwarding rate of the policer traffic.
Answers
B.
The CIR influences whether a packet is considered high-profile or low-profile.
B.
The CIR influences whether a packet is considered high-profile or low-profile.
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C.
The policer discards all incoming packets when PIR bucket reaches the MBS level.
C.
The policer discards all incoming packets when PIR bucket reaches the MBS level.
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D.
PIR bucket forwards packets that arrive with rates above PIR as out-of-profile.
D.
PIR bucket forwards packets that arrive with rates above PIR as out-of-profile.
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Suggested answer: A

Question 228

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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.
A.
Policer 3 forwards packets as out-of-profile when its PIR bucket has 4000 tokens.
Answers
B.
Policer 3 starts discarding low-priority packets when its PIR bucket has at least 3000 tokens.
B.
Policer 3 starts discarding low-priority packets when its PIR bucket has at least 3000 tokens.
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C.
Policer 4 forwards all its packets as out-of-profile.
C.
Policer 4 forwards all its packets as out-of-profile.
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D.
Policer 4 starts discarding low-priority packets when its PIR bucket has at least 3000 tokens.
D.
Policer 4 starts discarding low-priority packets when its PIR bucket has at least 3000 tokens.
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Suggested answer: A

Question 229

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

A.
An arbiter can adjust the CIR of its child policers.
A.
An arbiter can adjust the CIR of its child policers.
Answers
B.
An arbiter rate-limits the collective output of several policers towards each egress FFPC.
B.
An arbiter rate-limits the collective output of several policers towards each egress FFPC.
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C.
An arbiter can adjust the bandwidth assigned to its child arbiters and child policers.
C.
An arbiter can adjust the bandwidth assigned to its child arbiters and child policers.
Answers
D.
An arbiter does not need to honor the configurations of its child policers.
D.
An arbiter does not need to honor the configurations of its child policers.
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Suggested answer: C

Question 230

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

A.
The root arbiter can be the parent of a tier 2 arbiter.
A.
The root arbiter can be the parent of a tier 2 arbiter.
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B.
A tier 1 arbiter can be the parent of a policer.
B.
A tier 1 arbiter can be the parent of a policer.
Answers
C.
A child policer can have a priority level from 0 to 10.
C.
A child policer can have a priority level from 0 to 10.
Answers
D.
Weight is used by a parent arbiter to allocate bandwidth among children of equal level
D.
Weight is used by a parent arbiter to allocate bandwidth among children of equal level
Answers
Suggested answer: C
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