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Free Nokia 4A0-107 Practice Exam with Questions & Answers

Questions 1

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4A0-107 Question 1

At router PE1, customer packets are arriving tagged with a dotlp value of 6 and marked with a DSCP value of EF.

Based on the configuration shown below for a VPLS service, what will be the DSCP and EXP marking for the packet egressing the network port on this PE router? (Choose two)

Options:
A.

The DSCP value will be set to af21.

B.

The DSCP value will be set to af23.

C.

The DSCP value will remain as ef.

D.

The EXP value, in the MPLS headers, will be set to 4.

E.

The EXP value, in the MPLS headers, will be set to 3.

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Questions 2

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

Options:
A.

Network

B.

Scheduler

C.

Slope

D.

SAP-ingress

E.

Network queue

Questions 3

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

Options:
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.

Questions 4

For which of the following queues does a Nokia 7750 SR allocate a separate hardware queue per each destination fast forward path complex (FFPC)?

Options:
A.

An egress unicast queue defined in a network queue policy

B.

An ingress unicast queue defined in a SAP-ingress policy

C.

An ingress multipoint queue defined in a SAP-ingress policy

D.

An ingress multipoint queue defined in a network queue policy

Questions 5

Which of the following statements describes an advantage of the DiffServ QoS model over the IntServ QoS model?

Options:
A.

DiffServ reserves resources dynamically using the RSVP protocol.

B.

DiffServ only requires packets to be classified into forwarding classes at the first network hop.

C.

DiffServ provides granular differentiation and superior fairness because it processes traffic streams individually.

D.

DiffServ is more scalable it treats traffic streams as aggregates.

Questions 6

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

Options:
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.

Questions 7

Which of the following statements about the consequences of congestion is TRUE?

Options:
A.

Negative jitter results in a smaller than expected interval between transmitted packets.

B.

Jitter does not have any effect on the quality of video applications.

C.

Serialization delay is not affected by congestion.

D.

Queuing delay is a fixed form of delay in networks.

Questions 8

On the Nokia 7750 SR, what is the maximum number of queues that a single SAP-ingress policy can support in a VPLS?

Options:
A.

16

B.

8

C.

32

D.

48

E.

56

Questions 9

Which of the following policies does NOT exist by default on a network port?

Options:
A.

A network policy for every network interface configured on the port.

B.

A slope policy for the port on ingress.

C.

A network queue policy for the corresponding MDA on ingress.

D.

A network queue policy for the port on egress.

Questions 10

Which of the following statements about a SAP-ingress policy is FALSE?

Options:
A.

It maps customer traffic to forwarding classes on ingress.

B.

It can use customer QoS markings to do the mapping.

C.

The default SAP-ingress policy classifies all traffic into FC “be” with low priority.

D.

It serves the classification, queuing, and marking functions of QoS but does not serve scheduling

Exam Code: 4A0-107
Certification Provider: Nokia
Exam Name: Nokia Quality of Service
Last Update: May 15, 2025
Questions: 231

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