Alcatel Lucent 4A0-107 Nokia Quality of Service Online Training
Alcatel Lucent 4A0-107 Online Training
The questions for 4A0-107 were last updated at Feb 19,2025.
- Exam Code: 4A0-107
- Exam Name: Nokia Quality of Service
- Certification Provider: Alcatel Lucent
- Latest update: Feb 19,2025
A queue is configured with the following attributes:
MBS = 10KB
CBS = 5KB
High-Priority-Only = 30%
Assume that there is no CBS overbooking and that the slope-policy is disabled.
If the current queue depth is 8KB, what will happen to an in-profile packet arriving in the queue?
- A . It will be discarded because the high-priority-only threshold is exceeded.
- B . It will be queued but re-marked as "out-of-profile."
- C . It will be queued in the reserved portion of the buffer pool and remain "in-profile."
- D . It will be queued in the shared portion of the buffer pool but contend for shared buffer space with packets from other queues.
- E . It will be queued in the shared portion of the buffer pool but may be dropped if the buffer utilization exceeds the start-average value of the low slope.
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
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 QoS functions does the slope-policy perform?
- A . Classification
- B . Marking
- C . Queuing
- D . Congestion management
- E . Scheduling
Which of the following are entities of the Nokia 7750 SR on which you can NOT apply a network-queue policy? (Choose three)
- A . Router interfaces
- B . Ingress MDA
- C . Ingress Ethernet network ports
- D . Egress Ethernet network ports
- E . Service SAPs
When allocating scheduling resources, which of the following statements BEST describes how the egress port scheduler allocates bandwidth?
- A . The egress port scheduler takes the ratio of requested bandwidth to total bandwidth request from all children. It allocates bandwidth fairly, using these percentages and not exceeding the egress interface speed.
- B . The egress port scheduler allocates bandwidth based on a WRR distribution method that takes into account the CIR and PIR requested at each level and the max speed, either default or configured, on egress.
- C . The egress port scheduler allocates bandwidth on a first come, first served distribution method that takes into account the total CIR and PIR requested at each level and the max PIR requested from a single level.
- D . The egress port scheduler will limit the bandwidth offered to the egress port based on the over-subscription factor, provisioned under the router interface, while using a WRR scheduler for the remaining bandwidth.
- E . The egress port scheduler will use the Russian Dolls Method to allocate bandwidth to each level of requested bandwidth. HPO-Only is automatically set to 100%, allowing only high priority traffic to be buffered during congestion.
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
With hierarchical scheduling, up to ___________ tiers are supported on the Nokia 7750 SR.
- A . 8
- B . 3
- C . 4
- D . 5
- E . 6
Based on queue usage, which of the following QoS-policies when combined will allow queue rates to be dynamically allocated? (Choose two)
- A . The slope-policy
- B . The SAP-ingress policy
- C . The network-queue policy
- D . The scheduler-policy
- E . The network-policy
- F . The WRED-policy
- G . The arbitrator-policy
Real-time rate limiting on the service ingress is a feature that performs_____________. Traffic above the defined PIR is ______________.
- A . Policing, expedited
- B . Metering, marked discard eligible
- C . Marking, marked discard eligible
- D . Policing, discarded
- E . Shaping, discarded