4A0-107 Online Practice Questions and Answers

Which of the following statements describe the primary objectives of the policing of traffic flows on the Nokia 7750 SR? (Choose two)

A. Ensure that traffic flows conform to their traffic profile.

B. Log violations of metered traffic flows exceeding the CIR value set on the entity across which the traffic is moving.

C. Provide fairness between traffic flows, so that conforming (in-profile) traffic flows are not starved of bandwidth and/or buffer space by non-conforming (out-of-profile) flows.

D. Minimize packet loss and reduce end to end latency.

E. Ensure that variable latencies do not cluster short bursts of originally conforming packets and render them nonconforming.

Click the exhibit button below. Given this scheduler-policy configuration, which of the following can be said about the scheduler called "high"? (Choose two)

A. It is a parent scheduler.

B. It is the top-level scheduler.

C. It can allocate up to 50 Mbps of bandwidth to scheduler "low" since the bandwidth is not used by another Tier 3 scheduler.

D. It is a child scheduler.

E. It can only have queues as children.

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 rate-limiting approaches are used on the Nokia 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.

Which of the following statements about behavior aggregate and multi-field classification in a Nokia 7750 SR is TRUE?

A. Multi-field classification can use both MAC criteria and IP criteria in the same SAP-ingress QoS policy.

B. Behavior aggregate classification can use both lsp-exp and dscp in the same SAP-ingress QoS policy.

C. Multi-field classification cannot use both IP criteria and IPv6 criteria in the same SAP-ingress QoS policy.

D. Behavior aggregate classification cannot use both dot1p and lsp-exp in the same SAP-ingress QoS policy.

Which of the following statements about a queue's rate parameters is FALSE?

A. If CIR = PIR, then all packets will be considered as in-profile.

B. CIR can be set to 0.

C. CIR can be larger than PIR.

D. CIR can be set to `max'.

Which of the following statements about the default scheduler in the Nokia 7750 SR is FALSE?

A. The default scheduler spends an equal amount of time servicing each queue that has traffic to be sent out.

B. Queue-type can be configured as best-effort, expedite, or auto-expedite.

C. A queue will be serviced as expedited if its type is configured as expedited, regardless of the forwarding classes mapped to it.

D. A queue configured as auto-expedited will be an expedited queue as long as no Best Effort FC is mapped to it.

Forwarding sub-classes are configured in the context of which QoS policy type?

A. Network

B. Scheduler

C. Slope

D. SAP-ingress

E. Network queue

According to the SAP-egress policy configured and applied, which queue will AF traffic use?

A. Queue 3, because it is explicitly defined in the SAP-egress policy.

B. Queue 2, because it is explicitly configured in the queue-group template.

C. The default, queue 1, because there is a mismatch between the mapping in the SAP-egress policy and in the queue-group template.

D. AF traffic is dropped because there is a mismatch between the mapping in the SAP-egress policy and in the queue-group template.

Traffic corresponding to a layer-3 VPN arrives at router PE1 marked with a dot1p value of 4. The SDP carrying the traffic uses an MPLS transport tunnel. Given the policies applied on the routers in the diagram, what is the EXP value of packets arriving at router PE2?

A. 2

B. 3

C. 5

D. 6