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Nokia 4A0-107 - Nokia Quality of Service

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Total 231 questions

When using an egress port scheduler, which scheduling loop priority are orphaned queues serviced on?

A.

1st

B.

8th

C.

9th

D.

17th

According to the SAP-ingress QoS policy shown, which of the following statements about processing of the packets by policers 3 and 4 is TRUE?

A.

Policer 3 forwards packets as out-of-profile when its PIR bucket has 4000 tokens.

B.

Policer 3 starts discarding low-priority packets when its PIR bucket has at least 3000 tokens.

C.

Policer 4 forwards all its packets as out-of-profile.

D.

Policer 4 starts discarding low-priority packets when its PIR bucket has at least 3000 tokens.

Which of the following BEST describes a SAP when regarding QoS?

A.

A point in the network where EXP bits can be mapped to one of eight predefined FCs, each one with its own queue.

B.

A logical point in a service tunnel where all of customer traffic is aggregated.

C.

A point at which the initial classification of customer traffic occurs.

D.

A point in the network where QoS parameters are discarded in favor of lower-level hardware queuing functions, such as LLI (Link Layer Interleave).

E.

A point in the network where traffic flows from multiple different services are queued together, based on forwarding class.

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

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.

Which of the following are major components of QoS functionality on the Nokia 7750 SR? (Choose three)

A.

Microflow reservations using RSVP

B.

DSCP to EXP translation

C.

Traffic classification

D.

Automatic profiling and policy configuration

E.

Buffer memory management

F.

Traffic scheduling

Which of the following statements about the token buckets of a policer is TRUE?

A.

When a packet arrives, the PIR bucket depth is checked and the packet is discarded if this bucket is full.

B.

The CIR bucket of a policer is the reserved portion of its PIR bucket.

C.

The CIR bucket of a policer has two thresholds: CBS and HPO.

D.

Packets processed by the PIR bucket at an average rate above PIR will be forwarded as out-of-profile.

Forwarding subclasses are only relevant to, and are therefore applied within the context of, a _____________policy.

A.

network

B.

scheduling

C.

slope

D.

SAP-ingress

E.

network-queue

Click the exhibit button below.

Based on the configuration shown below, name the forwarding class to be associated with a TCP packet encapsulated inside an Ethernet frame that arrives on SAP 1/1/5 with the following characteristics:

Destination IP address = 120.110.1.1

TCP port number = 23

DSCP value = nc1

Dot1pvalue = 3

A.

H2

B.

NC

C.

L2

D.

EF

E.

H1

F.

BE

Which action should be taken to ensure that packets do not use the shared buffer space when put into a queue?

A.

Set the queue’s CBS to 0

B.

Set the queue’s MBS equal to the CBS

C.

Set the queue’s high-priority-only equal to the MBS

D.

Set the queue’s MBS to 0

E.

Set the queue’s high-priority-only to 0