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Nokia 4A0-107 - Nokia Quality of Service

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Total 231 questions

With hierarchical scheduling, up to ___________ tiers are supported on the Nokia 7750 SR.

A.

8

B.

3

C.

4

D.

5

E.

6

Which of the following fields can be marked or remarked for frames belonging to a Layer 2 service?

A.

DSCP

B.

PREC

C.

Dot1p

D.

ToS

E.

Q-in-Q

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 Nokia 7750 SR, in which order will packets be serviced?

A.

All in-profile packets in round-robin, then all out-of-profile packets in biased round-robin.

B.

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.

C.

In-profile EF, H2 and AF packets, then out-of-profile H2, AF and BE packets in biased round-robin.

D.

In-profile EF packets, then in-profile H2 and AF packets, then out-of-profile H2, AF and BE packets in biased round-robin.

E.

In-profile EF and H2 packets, then in-profile AF packets, then out-of-profile H2, AF and BE packets in biased round-robin.

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.

Which of the following should be performed if a service provider does not want packets to make use of the shared buffer space when queued?

A.

Set the CBS to 0.

B.

Set the MBS equal to the CBS.

C.

Set the high-priority-only equal to the MBS.

D.

Set the MBS to 0.

E.

Set the high-priority-only to 0.

A packet is to be encapsulated inside an MPLS tunnel which consists of two MPLS headers at the first network egress. Which of the MPLS EXP fields will be marked?

A.

The EXP field in the bottom MPLS header will be marked.

B.

The EXP field in both the top and bottom MPLS headers will be marked.

C.

For Layer 2 services, the top MPLS header will be marked; for Layer 3 services, the bottom MPLS header will be marked.

D.

The EXP field in the top MPLS header will be marked.

E.

Neither the top nor the bottom EXP field will be marked since EXP remarking can only be done on the network ingress.

What can be learned from the output of the command “show pools 1/2/2 network-egress” on the GigE port?

A.

All incoming packets belonging to forwarding class “l2” are stored in the reserved buffer space.

B.

All incoming packets belonging to forwarding class “af” are stored in the reserved buffer space.

C.

All incoming packets belonging to forwarding class “l1” are stored in the reserved buffer space.

D.

In-profile packets in the shared buffer space are being dropped.

If two queues complete for bandwidth in a hierarchical scheduler environment, which parameter is used by their parent scheduler to determine the priority with which each queue can use bandwidth above its committed rate?

A.

level

B.

cir-level

C.

weight

D.

cir-weight

Which of the following statements about CFHP policing hierarchy is FALSE?

A.

The root arbiter can be the parent of a tier 2 arbiter.

B.

A tier 1 arbiter can be the parent of a policer.

C.

A child policer can have a priority level from 0 to 10.

D.

Weight is used by a parent arbiter to allocate bandwidth among children of equal level

Which of the following are trusted boundaries, by default? (Choose two)

A.

An IES SAP

B.

A VPLS SAP

C.

A network port

D.

AVPRN SAP

E.

An access port