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Nokia 4A0-107 - Nokia Quality of Service

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Total 231 questions

WRED can be used to help avoid TCP slow-start synch problems.

A.

TRUE

B.

FALSE

Which of the following statements regarding scheduling are TRUE? (Choose two)

A.

Scheduler policies cannot be children of an egress port-scheduler.

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.

On the Nokia 7750 SR, which of the following QoS-related policies can be configured on a SAP? (Choose three)

A.

The slope-policy

B.

The SAP-ingress policy

C.

The SAP-egress policy

D.

The network-queue policy

E.

The scheduler-policy

Which of the following statements BEST defines policing?

A.

The process of delaying packets within a traffic stream to have them conform to a defined traffic profile.

B.

The overall treatment of a defined subset of a customer's traffic within a DiffServ domain.

C.

The process of discarding packets within a traffic stream in accordance with the state of a meter to enforce a defined traffic profile.

D.

The action of setting the DiffServ codepoint of a packet prior to its entry into a downstream DiffServ domain.

E.

A specified algorithm or operation that is implemented in a node in order to realize one or more per-hop behaviors.

To implement Hierarchical-QoS (Multi-tiered scheduling), which of the following actions must be undertaken? (Choose three)

A.

H-QoS capabilities must be enabled globally on the router

B.

A scheduler-policy must be configured.

C.

The queues in the SAP-ingress and SAP-egress policies do not require additional configuration attributes to make use of the hierarchical schedulers.

D.

The network queue policy must be configured to make use of the scheduler-policy.

E.

The scheduler-policy must be referenced in the SAP-ingress and SAP-egress policies.

F.

The scheduler-policy must be applied on the service SAP.

Which of the following can be used as classifiers of customer traffic? (Choose three)

A.

DSCP value

B.

802.1p value

C.

IP DF bit

D.

TCP/UDP port numbers

E.

HTML version number

While deciding how to share the available bandwidth among its children, when does a port scheduler consider the parameter “level” of a child?

A.

During the allocation of within-CIR bandwidth.

B.

During the allocation of above-CIR bandwidth.

C.

During the allocation of both within-CIR and above-CIR bandwidth.

D.

The port scheduler does not use the level of a child for making bandwidth allocation decisions

Which of the following are characteristics of DSCP? (Choose two)

A.

DSCP is part of the Layer 3 header.

B.

DSCP is a 6-bit field.

C.

DSCP specifies eight different priorities.

D.

DSCP specifies four precedence levels.

E.

DSCP is part of the Layer 2 header

F.

DSCP specifies 128 different per-hop behaviors.

Which of the following statements describes a queue’s weight parameter that is used in the hierarchical scheduling?

A.

The weight specifies the priority of the queue during scheduling up to its CIR.

B.

The weight specifies the priority of the queue during scheduling above-CIR, up to its PIR.

C.

The weight is used to determine how this queue and other queues or schedulers at the same CIR-level share available CIR bandwidth at that level.

D.

The weight is used to determine how this queue and other queues or schedulers at the same level share available above CIR bandwidth at that level.

Which of the following statements about scheduling on the Nokia 7750 SR is FALSE?

A.

When using priority-mode queues, traffic marked as low-priority on ingress and scheduled in the above-CIR loop will be considered as in-profile at egress.

B.

When using priority-mode queues, traffic marked as high-priority on ingress and scheduled in the above-CIR loop will be considered as out-of-profile at egress.

C.

When using profile-mode queues, traffic marked as low-priority on ingress and scheduled in the above-CIR loop will be considered as out-of-profile at egress.

D.

When using profile-mode queues, traffic marked as in-profile on ingress and scheduled in the above-CIR loop will still be considered as in-profile at egress.