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With hierarchical scheduling, up to ___________ tiers are supported on the Alcatel-Lucent 7750 SR.
Correct Answer: B
Which of the following are characteristics of 802.1p? (Choose two)
A. 802.1p adds 16 bits to the Layer 2 header,
B. 802.1p adds 16 bits to the Layer 3 header.
C. 802.1p specifies 64 different priority levels.
D. 802.1p uses a field in the 802.1Q header.
E. 802.1p uses a field in the Layer 3 IP header
F. 802.1p defines a 3-bit Class of Service field.
Correct Answer: DF
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)
B. CIR level
C. CIR weight
Correct Answer: EF
Click the exhibit button below. The service provider has both a VLL (epipe) service and a VPLS, as shown in the
At router PE B, traffic arriving from both services will have the same network-queue policy applied.
Correct Answer: B
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
Correct Answer: BD
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.
Correct Answer: B
On the Alcatel-Lucent 7750 SR, what is the maximum number of queues that a single SAP-ingress policy can support in
Correct Answer: C
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.
C. Biased round robin queuing at ingress only.
D. Soft shaping at all network interfaces.
E. Soft shaping at network ingress only.
Correct Answer: DE
On the Alcatel-Lucent 7750 SR, what is a slope policy used for?
A. Defining the slope of the TCP slow-start mechanism for self generated traffic.
B. Defining the slope of the scheduling rate per forwarding class when using HQoS.
C. Defining the high and low slope values when deploying buffer admission control for UDP traffic in the committed
D. Defining the high and low slope values when deploying buffer admission control for TCP traffic in the shared buffer
E. Defining the high and low slope values when deploying buffer admission control for TCP traffic in the committed
Correct Answer: D
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?
Note: Only relevant portions of the network policy are shown.
E. None of the above.
Correct Answer: A
Click the exhibit button below. A service provider has applied the SAP-ingress policy configuration below on his customer\\’s SAP. The service provider notices that all of the customer\\’s traffic is being dropped at the SAP-ingress.
Which of the following actions can resolve the problem, if applied on its own? (Choose three)
A. Set the CIR of queue 3 to a non-zero value corresponding to the customer\\’s expected bandwidth requirements.
B. Set queue 3 to use priority mode.
C. Set the traffic classification of packets to in-profile.
D. Set the high-priority-only value to 0.
E. Map AF traffic to queue 1
Correct Answer: CDE
It is necessary for Tier 1 schedulers to obtain bandwidth from a higher tier scheduler.
Correct Answer: B
Click the exhibit button below. Given the scheduler-policy (below), how much bandwidth can the best-effort traffic
receive (PIR and CIR) when the ingress rate of each queue is 10Mbps?
A. PIR = 4Mbps. CIR = 1Mbps
B. PIR = 1Mbps, CIR = 1 Mbps
C. PIR = 10Mbps, CIR = 1Mbps
D. PIR = 5Mbps, CIR = 1.25Mbps
E. PIR = 1.25Mbps, CIR = 1.25Mbps
Correct Answer: B
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