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Nokia 4A0-C02 - Nokia SRA Composite Exam

Page: 13 / 13
Total 639 questions

Which of the following statements describe the operation of WRED on the Alcatel-Lucent 7750 SR? (Choose three)

A.

WRED monitors the shared buffer space utilization over a period of time.

B.

WRED disables the TCP slow-start congestion control mechanism.

C.

WRED uses two configurable slopes for each buffer pool: a high slope and a low slope.

D.

WRED uses the shared buffer utilization, instead of the individual queue depth, to get a better picture of the average resource utilization of the shared buffer space.

E.

WRED polices the shared buffer pool and marks all packets above a certain rate as "discard eligible."

Click the exhibit button below. Given the output of the #show pools 1/2/2 network-egress command on a GigE port, what can the service provider deduce? (Choose two)

A.

QoS is not configured on the router.

B.

Packets in forwarding classes "be" and "12" are being queued.

C.

Traffic belonging to forwarding class "ef" is not experiencing queuing delays.

D.

Traffic belonging to forwarding class "11 "will never make use of the shared buffer pool.

E.

Out-of-profile traffic in the shared buffer pool is being dropped.

Click the exhibit button below. Given that the slope-policy (below) has been enabled and applied on a network port, which of the following statements are TRUE? (Choose three)

A.

All out-of-profile traffic will be dropped before any in-profile is dropped.

B.

The time average factor of 0 will discard all packets arriving in the shared buffer pool.

C.

When the shared buffer utilization reaches 51%, in-profile packets might be dropped.

D.

The highest probability with which an out-of-profile packet can be dropped is 20%.

E.

When an in-profile packet arrives and the shared buffer utilization is at 69%, the packet will have approximately a 60% likelihood of being discarded.

Which of the following statements are TRUE? (Choose two)

A.

The primary contributors to latency are distance, scheduling, and congestion.

B.

The weighted round robin scheduling algorithm will result in more delay for high priority traffic than the regular round robin algorithm.

C.

The round robin scheduling algorithm will result in less jitter for low priority traffic than a strict priority scheduler.

D.

Packet loss can be reduced by decreasing the amount of buffer space available to a queue.

E.

Latency can be reduced by increasing the amount of buffer space available to a queue.

Which of the following identify the port roles of the mesh SDPs?

A)

B)

C)

D)

A.

Option A

B.

Option B

C.

Option C

D.

Option D

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

A.

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.

B.

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.

C.

The greater the difference between PIR and CIR rates in a queue, the less likely a CIR will be provided.

D.

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.

E.

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.

Click the exhibit button below. A service provider has applied the SAP-ingress policy configuration below on his customer's SAP. The service provider notices that all of the customer's traffic is being dropped at the SAP-ingress. Which of the following actions can resolve the problem, if applied on its own? (Choose three)

A.

Set the CIR of queue 3 to a non-zero value corresponding to the customer's expected bandwidth requirements.

B.

Set queue 3 to use priority mode.

C.

Set the traffic classification of packets to in-profile.

D.

Set the high-priority-only value to 0.

E.

Map AF traffic to queue 1

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

A.

TRUE

B.

FALSE

If traffic is destined to queue 5, which has a high-priority-only value of 0 in the network-queue policy, all out-of-profile packets will be dropped.

A.

TRUE

B.

FALSE

WRED can be used to help avoid TCP slow-start synch problems.

A.

TRUE

B.

FALSE

When using an egress port scheduler, on which scheduling loop are orphaned queues serviced?

A.

Level 8 within CIR.

B.

Level 8 between CIR and PIR.

C.

Level 8, once all PIR is serviced.

D.

Level 1 within CIR.

E.

Level 1 between CIR and PIR.

F.

Level 1, once all PIR is serviced.