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Click the exhibit button below. Given the scheduler-policy (below), which of the following can be done to guarantee that the best-effort traffic receives its configured CIR value?
Change the CIR-level value for the best-effort queue to 8.
Do not change anything; it is already guaranteed to receive its CIR
Change the CIR-level value for the best-effort queue to 1.
Change the CIR-weight value of the AF queue to 0.
Answer: A, D
Which of the following rate-limiting approaches are used on the Alcatel-Lucent 7750 SR? (Choose two)
Shapeless policing at SAP-ingress only.
Shapeless policing at SAP-ingress and egress.
Biased round robin queuing at ingress only.
Soft shaping at all network interfaces.
Soft shaping at network ingress only.
Answer: D, E
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).
Which of the following statements are TRUE regarding the PE device in a QoS enabled network? (Choose two)
A device that provides no differentiation between customer traffic flows.
A device that classifies and marks customer traffic.
A device that uses MPLS EXP bits to differentiate between traffic flows.
A device that creates macroflows towards the core from multiple customer sites.
A device that passes macroflows while optionally changing QoS markings.
Answer: B, D
On the Alcatel-Lucent 7750 SR, what is the maximum number of queues that a single SAP-ingress policy can support in a VPLS?
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?
All in-profile packets in round-robin, then all out-of-profile packets in biased round- robin.
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.
In-profile EF, H2 and AF packets, then out-of-profile H2, AF and BE packets in biased round- robin.
In-profile EF packets, then in-profile H2 and AF packets, then out-of-profile H2, AF and BE packets in biased round-robin.
In-profile EF and H2 packets, then in-profile AF packets, then out-of-profile H2, AF and BE packets in biased round-robin.
Which of the following statements regarding scheduling are TRUE? (Choose two)
Scheduler policies cannot be children of an egress port-scheduler.
HQoS provides a static method of allocating scheduling resources to each queue and/or child.
Scheduler policies can be applied to the MDA to schedule network ingress traffic.
Every time a scheduler-policy is assigned to a SAP, a new hardware scheduler is created to service the SAP.
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
Which of the following statements regarding the default scheduler in the Alcatel-Lucent 7750 SR are TRUE? (Choose two)
There are a maximum of 8 levels of priority serviced using a round-robin algorithm.
The default scheduler will spend an equal amount of time in each queue, as long as there is traffic present
The H1 internal forwarding class will receive its CIR before AF traffic.
Orphaned queues will be scheduled out of the BE queue.
A queue servicing EF and AF traffic will require explicit configuration to set the queue to expedited.
Answer: C, E
Click the exhibit button below.
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
How does an IOM3 improve the queue usage over an IOM2 in an Alcatel-Lucent 7750 SR? (Choose two)
The IOM3 adds more memory to both forwarding complexes which increases the total number of queues available.
The IOM3 only contains a single forwarding complex which reduces the number of queues used.
The IOM3 allows multiple forwarding classes to be assigned to a single queue.
The IOM3 allows queues to be dynamically allocated between ingress and egress.
The IOM3 has a larger CPU capable of tracking active hardware queue utilization and adjusting memory allocation accordingly.
Answer: B, D
Which of the following statements BEST describes the IntServ model?
Has the ability to distinguish traffic in 32 different ways.
Uses the RSVP protocol to create microflows through a network.
Has the ability to manually configure foiwarding classes through a network.
Uses the RSVP protocol to create macroflows through a network.
Alcatel-Lucent 4A0-107 Exam (Alcatel-Lucent Quality of Service) Detailed Information
4A0-107 - Alcatel-Lucent Quality of Service
4A0-107 Test Objectives
Nokia Quality of Service
Nokia Quality of Service
Credit Towards Certifications:
Nokia Mobile Routing Professional
Nokia Triple Play Routing Professional
Nokia Service Routing Architect
Mandatory Exam Prerequisites:
Exam Appointment Duration:
135 minutes. This is the exam duration plus a 45 minute tutorial on computer-based examinations.
Number of Questions:
This overview provides broad guidelines for the type of content that may be included in the exam. Other material not described here may be incorporated into the exam.
List the business drivers for QoS
Describe traffic classification, queuing, scheduling, and marking as they pertain to QoS including, rate limiting, resource allocation and congestion management
Configure various QoS-related policies on the Nokia 7750 SR to provide differentiated services confirming to SLAs
List the criteria that can be used to classify and mark packets at service and network ingress/egress to support optimal use of networking resources
State the purpose of the queuing and scheduling parameters PIR, CIR, MBS, CBS, High Priority only, queue type, queue mode and adaptation rule
State the purpose of Weighted Random Early Detection (WRED) to increase average utilization of networking resources as they approach congestion
State the need for a multi-tiered scheduling (HQoS) architecture on SAP ingress and egress
Apply QoS concepts to the applicable service (virtual private wire service [VPWS], virtual private LAN service [VPLS], virtual private routed network [VPRN], or Internet enhanced service [IES])
Describe the need for egress port scheduling and its operation in conjunction with an HQoS scheduler
Explain how standalone policers enforce the configured rate, CIR, MBS, CBS and HPO to color packets.
Explain how Class Fair Hierarchical Policing (CFHP ) supports four layers of hierarchy, and dynamically enforces rates, using the priority, and weights assigned to child policers and arbiters.
Design, configure, apply, and predict the expected behavior of a CFHP policy.
Explain Ethernet queue groups and how they are typically used on access ingress, access egress, network ingress, and network egress.
Exam exemptions are available for individuals with IP certifications from other organizations. Refer to the following link for additional details: Credit for Other IP Certifications.
Price: $125 USD based on exam delivery in North America. Pricing in other countries may vary slightly depending on country location.
Exams are delivered by our external test delivery partner, Pearson VUE. For more information, access their website at www.pearsonvue.com/nokia.