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4A0-107 Nokia Quality of Service Free Practice Exam Questions (2025 Updated)

Prepare effectively for your Nokia 4A0-107 Nokia Quality of Service certification with our extensive collection of free, high-quality practice questions. Each question is designed to mirror the actual exam format and objectives, complete with comprehensive answers and detailed explanations. Our materials are regularly updated for 2025, ensuring you have the most current resources to build confidence and succeed on your first attempt.

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Total 231 questions

When deploying an Nokia MPLS network with QoS, how are the EXP bits set?

A.

The first 3 bits of the DSCP value are copied directly into the EXP field on the first network egress.

B.

The EXP bits are set on the first network egress, based on a combination of the SAP-ingress classification and the network policy applied.

C.

The 3 priority bits are copied directly from the dot1p header into the EXP field of the first MPLS header.

D.

The EXP bits are set based on a default map that translates DSCP codes into internal forwarding classes on SAP-ingress.

Click the exhibit button below. Traffic arriving at router PE 1 is marked with a dot1p value of 4. Given the network policies applied on the routers in the diagram below, what is the EXP value of packets arriving at router PE 2?

Note: Only relevant portions of the network policy are shown.

A.

2

B.

3

C.

5

D.

6

E.

None of the above.

In which policies, on the Nokia 7750 SR. is classification performed? (Choose three)

A.

SAP-ingress policy

B.

SAP-egress policy

C.

IP-criteria policy

D.

Network-queue policy

E.

Slope policy

F.

Network policy

Which of the following fields is in the MPLS header?

A.

802.1p bits

B.

Precedence

C.

DSCP

D.

EXP

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

Click the exhibit button below. Each router is interconnected by a single GigE link, as shown in the diagram below.

Note: The arrows show the direction of traffic flow.

Traffic from Customer A and Customer B that is classified to the same forwarding class is queued together at the ingress of Router B.

A.

True

B.

False

Which of the following QoS functions does the slope policy perform?

A.

Classification

B.

Marking

C.

Buffer admission control

D.

Scheduling

Which of the following statements about port schedulers is TRUE?

A.

A port scheduler can only be implemented on a network egress port when queue-groups are configured for that port.

B.

A port scheduler can be implemented on an access ingress port.

C.

A port scheduler can be implemented without HQoS on an access egress port.

D.

A port scheduler can be implemented on a network ingress port.

In the diagram shown above, applying policing and soft-policing on access ingress is typical for which of the following types of traffic?

A.

Real-time

B.

Assured

C.

Best-effort

D.

Self-generated

Which of the following statements about burst-limit of a queue is FALSE?

A.

Burst-limit sets a limit on the maximum burst of packets transmitted during each scheduler visitation time.

B.

Proper configuration of the burst-limit can prevent packet drops on the downstream nodes resulting from traffic bursts.

C.

The lower the configured burst limit value, the lower the burst allowed to enter the queue.

D.

If the burst-limit is not configured, a default burst-limit value will be used by the queue.

How many queues are available for use on service egress within a VPLS service?

A.

1 multipoint and 8 unicast.

B.

8 queues, regardless of traffic type.

C.

8 unicast and 24 multipoint.

D.

8 unicast and 8 multipoint.

E.

16 queues, distributed as desired.

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

Which of the statements about packet classification is TRUE?

A.

It sets the destination IP address of the packet.

B.

It uses RVSP to inform other QoS capable routers how the packet should be treated.

C.

It sets the TOS, DSCP, EXP, or DOT1p field based on classification criteria.

D.

It can use a customer’s encapsulated data to determine a packet’s forwarding class.

If a packet is marked on a SAP-ingress, it will be remarked at the first network egress point (if remarking is enabled in the network egress policy).

A.

TRUE

B.

FALSE

How many tiers of schedulers can be supported in hierarchical scheduling on the Nokia 7750 SR?

A.

8

B.

3

C.

5

D.

6

If traffic is destined to queue 5, which has a high-priority-only value of 0 in the network-queue policy, all out-of-profile packets will be dropped.

A.

TRUE

B.

FALSE

Which of the following statements regarding buffer pool allocation are FALSE? (Choose two)

A.

Each network egress port receives its own buffer pool.

B.

Each SAP-egress port receives its own buffer pool.

C.

All SAP-ingress ports on the same MDA share a buffer pool.

D.

All the network ingress ports on the same MDA share a buffer pool.

E.

Each network ingress port on the same MDA receives its own buffer pool.

Which of the following statements about behavior aggregate classification is TRUE?

A.

It sets both the forwarding class and the packet’s dot1p, lsp-exp, precedence, or dscp field to the same value.

B.

It groups all packets together into a single aggregate stream, and gives all packets the same treatment.

C.

It copies the three most significant bits in the packet’s dscp field into the forwarding class.

D.

It assigns a forwarding class based on the packet’s dot1p, lsp-exp, precedence, or dscp value.

If packets egressing a SAP do not match any criteria defined in the SAP-egress policy, which forwarding class will these packets be assigned to?

A.

The default forwarding class defined in the SAP-egress policy.

B.

The forwarding class inherited from network ingress classification.

C.

Best Effort.

D.

If there is no match, packets will be dropped.

An egress port scheduler applied to an Ethernet port has a configured bandwidth of 100 Mbps. All frames transmitted on the port are 80 bytes. What is the aggregate transmit bandwidth of all queues using the port scheduler?

A.

100Mbps * 20/(80 + 20) = 20 Mbps

B.

100Mbps * 80/(80 + 20) = 80 Mbps

C.

100Mbps

D.

100+ 100 * 20/(80 + 20) = 120 Mbps

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Total 231 questions
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