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4A0-107 Practice Questions

Nokia Quality of Service

Last Update 13 hours ago
Total Questions : 231

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Question # 21

Click the exhibit button below.

Question # 21

Based on the configuration of the network policy (below), what will be the forwarding class associated with a MPLS encapsulated customer packet that arrives on a dotlQ encapsulated network port 1/1/4:1 on P1 with the following characteristics:

EXP value = 6

DSCP value = cs1

Dot1pvalue = 3

Options:

A.  

EF

B.  

H1

C.  

L1

D.  

H2

E.  

L2

Discussion 0
Question # 22

Question # 22

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?

Options:

A.  

EF, in

B.  

H1, out

C.  

BE, out

D.  

L1, in

Discussion 0
Question # 23

How many queues are available for use on service egress within a VPLS service?

Options:

A.  

1 multipoint and 8 unicast.

B.  

8 queues, regardless of traffic type.

C.  

8 unicast and 24 multipoint.

D.  

8 unicast and 8 multipoint.

E.  

16 queues, distributed as desired.

Discussion 0
Question # 24

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

Options:

A.  

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

B.  

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

C.  

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

D.  

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

Discussion 0
Question # 25

An IOM3 card of a Nokia7750 SR is enabled with the default scheduler and the policy shown in the image is applied to an access port on this card. In which order will packets be scheduled out of the queues?

Question # 25

Options:

A.  

Queue 3 within-CIR packets, then queue 4 within-CIR packets, then queue 3 and queue 4 above-CIR packets in round-robin.

B.  

Queue 4 within-CIR packets, then queue 3 within-CIR packets, then queue 3 and queue 4 above-CIR packets in round-robin.

C.  

Queue 3 within-CIR packets, then queue 4 within-CIR packets, then queue 3 above-CIR packets, and finally queue 4 above-CIR packets.

D.  

Queue 4 within-CIR packets, then queue 3 within-CIR packets, then queue 4 above-CIR packets, and finally queue 3 above-CIR packets.

Discussion 0
Question # 26

Which action should be taken to ensure that packets do not use the shared buffer space when put into a queue?

Options:

A.  

Set the queue’s CBS to 0

B.  

Set the queue’s MBS equal to the CBS

C.  

Set the queue’s high-priority-only equal to the MBS

D.  

Set the queue’s MBS to 0

E.  

Set the queue’s high-priority-only to 0

Discussion 0
Question # 27

Which following statements about the four-step QoS process (classification, queuing, scheduling, and marking/remarking) executed for every packet entering a Nokia 7750 SR is TRUE?

Options:

A.  

The process happens only before the packet goes through the switching fabric.

B.  

The process happens only before the packet goes onto the egress port.

C.  

Marking/remarking the packets is for future classification.

D.  

Marking/remarking the packets will occur right after classification of the packet.

Discussion 0
Question # 28

Which of the following statements about CIR of a queue is TRUE?

Options:

A.  

It may exceed PIR of the queue.

B.  

It may be exceeded by the average servicing rate of the queue.

C.  

It varies depending on the traffic characteristics.

D.  

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

Discussion 0
Question # 29

A SAP-ingress policy is configured so that ping traffic is classified as FC L1 and mapped to queue 3; however, all traffic is placed in queue 1. What is the most probable reason for this?

Options:

A.  

The default forwarding class for ICMP traffic is BE and cannot be changed.

B.  

The SAP has been shut down.

C.  

Queue 3 has no PIR or CIR configured, and thus cannot hold any packets.

D.  

The SAP-ingress policy has not been applied to the SAP.

Discussion 0
Question # 30

Click the exhibit button below. Traffic arriving at router PE 1 is marked with a dot1p value of 4. Given the network policies applied on the routers in the diagram below, what is the EXP value of packets arriving at router PE 2?

Question # 30

Note: Only relevant portions of the network policy are shown.

Options:

A.  

2

B.  

3

C.  

5

D.  

6

E.  

None of the above.

Discussion 0
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