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Alcatel-Lucent Quality of Service Practice Test

4A0-107 exam Format | Course Contents | Course Outline | exam Syllabus | exam Objectives

Exam Name: Nokia Quality of Service
Exam Number: 4A0-107
Credit Towards Certifications: Nokia Service Routing Architect
Exam Duration: 90 Minutes
Exam Appointment Duration: 135 minutes
Number of Questions: 60
Language: English

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Alcatel-Lucent
4A0-107
Alcatel-Lucent Quality of Service
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Answer: D , ?, ?
QUESTION: 90
Click the exhibit button below. Given the scheduler-policy (below), which of the
following can be done to ensure that the best-effort traffic receives its configured CIR
value?
A. Change the CIR-level value for the best-effort queue to 8.
B. Do not change anything; it is already guaranteed to receive its CIR
C. Change the CIR-level value for the best-effort queue to 1.
D. Change the CIR-weight value of the AF queue to 0.
Answer: A, D
QUESTION: 91
Which of the following rate-limiting approaches are used on the Alcatel-Lucent 7750
SR? (Choose two)
A. Shapeless policing at SAP-ingress only.
B. Shapeless policing at SAP-ingress and egress.
39
C. Biased round robin queuing at ingress only.
D. Soft shaping at all network interfaces.
E. Soft shaping at network ingress only.
Answer: D, E
QUESTION: 92
If a packet is marked on a SAP-ingress, it will be remarked at the first network egress
point (if remarking is enabled in the network egress policy).
A. TRUE
B. FALSE
Answer: B
QUESTION: 93
Which of the following statements are TRUE regarding the PE device in a QoS enabled
network? (Choose two)
A. A device that provides no differentiation between customer traffic flows.
B. A device that classifies and marks customer traffic.
C. A device that uses MPLS EXP bits to differentiate between traffic flows.
D. A device that creates macroflows towards the core from multiple customer sites.
E. A device that passes macroflows while optionally changing QoS markings.
Answer: B, D
QUESTION: 94
On the Alcatel-Lucent 7750 SR, what is the maximum number of queues that a single
SAP-ingress policy can support in a VPLS?
A. 16
B. 8
C. 32
D. 48
E. 56
Answer: C
QUESTION: 95
40
Click the exhibit button below. A network operator has configured a network-queue
policy to map forwarding classes to queues, as shown in the exhibit below. Based on the
default scheduling behavior of the Alcatel-Lucent 7750 SR, in which order will packets
be serviced?
A. All in-profile packets in round-robin, then all out-of-profile packets in biased round-
robin.
B. In-profile EF packets, then in-profile H2 packets, then in-profile AF packets, then out-
of-profile EF packets, then out-of-profile H2 and AF packets, and then out-of-profile BE
packets.
C. In-profile EF, H2 and AF packets, then out-of-profile H2, AF and BE packets in
biased round- robin.
D. In-profile EF packets, then in-profile H2 and AF packets, then out-of-profile H2, AF
and BE packets in biased round-robin.
E. In-profile EF and H2 packets, then in-profile AF packets, then out-of-profile H2, AF
and BE packets in biased round-robin.
Answer: D
QUESTION: 96
Which of the following statements regarding scheduling are TRUE? (Choose two)
A. Scheduler policies cannot be children of an egress port-scheduler.
41
B. HQoS provides a static method of allocating scheduling resources to each queue
and/or child.
C. Scheduler policies can be applied to the MDA to schedule network ingress traffic.
D. Every time a scheduler-policy is assigned to a SAP, a new hardware scheduler is
created to service the SAP.
E. A scheduler applied to multiple SAPs within the same service will result in a single
hardware scheduler operating across all SAPs within the service.
Answer: C, D
QUESTION: 97
Which of the following statements regarding the default scheduler in the Alcatel-Lucent
7750 SR are TRUE? (Choose two)
A. There are a maximum of 8 levels of priority serviced using a round-robin algorithm.
B. The default scheduler will spend an equal amount of time in each queue, as long as
there is traffic present
C. The H1 internal forwarding class will receive its CIR before AF traffic.
D. Orphaned queues will be scheduled out of the BE queue.
E. A queue servicing EF and AF traffic will require explicit configuration to set the queue
to expedited.
Answer: C, E
QUESTION: 98
Click the exhibit button below.
42
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
A. EF
B. H1
C. L1
D. H2
E. L2
Answer: D
QUESTION: 99
How does an IOM3 Boost the queue usage over an IOM2 in an Alcatel-Lucent 7750
SR? (Choose two)
A. The IOM3 adds more memory to both forwarding complexes which increases the total
number of queues available.
B. The IOM3 only contains a single forwarding complex which reduces the number of
queues used.
C. The IOM3 allows multiple forwarding classes to be assigned to a single queue.
D. The IOM3 allows queues to be dynamically allocated between ingress and egress.
43
E. The IOM3 has a larger CPU capable of tracking active hardware queue utilization and
adjusting memory allocation accordingly.
Answer: B, D
QUESTION: 100
Which of the following statements BEST describes the IntServ model?
A. Has the ability to distinguish traffic in 32 different ways.
B. Uses the RSVP protocol to create microflows through a network.
C. Has the ability to manually configure foiwarding classes through a network.
D. Uses the RSVP protocol to create macroflows through a network.
Answer: B
44

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