4A0-107 Real Exam Questions and Verified Answers

Question 1 Single choice

Which of the following statements about the consequences of congestion is TRUE?

A
Negative jitter results in a smaller than expected interval between transmitted packets.
B
Jitter does not have any effect on the quality of video applications.
C
Serialization delay is not affected by congestion.
D
Queuing delay is a fixed form of delay in networks.

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Correct answer: A

Question 2 Single choice

Click the exhibit button below. Each router is interconnected by a single GigE link, as shown in the diagram below.

Note: The arrows show the direction of traffic flow.

Traffic from Customer A and Customer B that is classified to the same forwarding class is queued together at the ingress of Router B.

A
True
B
False

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Correct answer: A

Question 3 Single choice

When we select the adaptation rule "min", how are the operational CIR/PIR rates of a queue calculated?

A
The administrative PIR values are ignored and both operational rates are set to the minimum residual rate allowed by the hardware.
B
The administrative PIR value is ignored and both operational rates are set to the administrative CIR value.
C
They are chosen as the largest multiple of the hardware rate step that is less than or equal to the
corresponding CIR/PIR administrative value.
D
They are chosen as the smallest multiple of the hardware rate step that is greater than or equal to the
corresponding CIR/PIR administrative value.

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Correct answer: D

Question 4 Single choice

According to the configurations shown, which of the following statements about the classification and queuing of self-generated OSPF traffic is TRUE?

A
It will be classified into forwarding class BE and stored in queue 1.
B
It will be classified into forwarding class BE and stored in queue 8.
C
It will be classified into forwarding class NC and stored in queue 1.
D
It will be classified into forwarding class NC and stored in queue 8.

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Correct answer: A

Question 5 Single choice

Which of the following is NOT an adaptation rule supported on the Nokia 7750 SR for calculating the operational CIR/PIR of a queue?

A
Closest
B
Average
C
Min
D
Max

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Correct answer: B

Question 6 Multiple choice

To implement Hierarchical-QoS (Multi-tiered scheduling), which of the following actions must be undertaken? (Choose three)

A
H-QoS capabilities must be enabled globally on the router
B
A scheduler-policy must be configured.
C
The queues in the SAP-ingress and SAP-egress policies do not require additional configuration attributes to make use of the hierarchical schedulers.
D
The network queue policy must be configured to make use of the scheduler-policy.
E
The scheduler-policy must be referenced in the SAP-ingress and SAP-egress policies.
F
The scheduler-policy must be applied on the service SAP.

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Correct answers: B, E, F

Question 7 Single choice

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

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Correct answer: B

Question 8 Multiple choice

Which of the following parameters are used in a hierarchical scheduler-policy to specify the priority of the child scheduler/queue for allocating bandwidth beyond its committed rate? (Choose two)

A
CIR
B
CIR level
C
CIR weight
D
Rate
E
Level
F
Weight

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Correct answers: E, F

Question 9 Single choice

Which of the following is an advantage of using queue-groups on a service SAP?

A
It enables CFHP.
B
It more scalable than using policers.
C
It allows a separate set of queues/policers for each VLAN on a port.
D
It allows a set of queues to be shared among multiple SAPs.

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Correct answer: D

Question 10 Single choice

Which of the following self-generated traffic applications is considered "management" traffic, as opposed to "protocol" traffic?

A
IS-IS
B
RSVP
C
ICMP
D
BGP

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Correct answer: C