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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

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.

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

A frame belonging to a Layer 2 service is encapsulated in an MPLS tunnel at a network-egress port. Which of the following fields in the frame can be marked or remarked at the network egress port?

A.

ToS

B.

DSCP

C.

PREC

D.

EXP

Assume all transmitted frames on a SONET port are 1500 bytes and that the average frame overhead has been configured as 10%. If the total bandwidth of all queues, excluding overhead, needs to be guaranteed at 55 Mbps, how much bandwidth should be configured for the egress port scheduler applied on that port?

A.

55 Mbps / 1.1 = 50 Mbps

B.

55 Mbps

C.

55 Mbps + 55 Mbps * 0.1 / 1.1 = 60 Mbps

D.

55 Mbps * 1.1 = 60.5 Mbps

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 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

Which of the following statements BEST describes where shaping mechanisms should be applied?

A.

On all ports on the Nokia 7750 SR.

B.

At the junction of high-speed to low-speed links or at places of traffic aggregation.

C.

At the junction of low-speed to high-speed links or at places of traffic aggregation.

D.

On low-speed WAN links.

E.

Nowhere. Shaping is only performed in hardware and serviced in a round-robin.

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.

Which of the following statements regarding egress FC and profile over-ride are TRUE? (Choose two)

A.

Packets can be classified into 16 different FCs when using priority mode queuing.

B.

This feature is available on egress SAPs within any service.

C.

MPLS EXP bits can be changed based on multi-field classification.

D.

If a Behavior Aggregate (BA) and Multi-field (MF) match occurs, only the MF override parameters will take effect.

E.

If a Behavior Aggregate (BA) and Multi-field (MF) match occurs, the BA classification can override the forwarding class while the MF classification can override the profile.

Given the scheduler-policy parameters shown, and assuming the offered rate of each queue is 10 Mbps, what are the operational PIR and CIR for queue 3?

A.

PIR = 4 Mbps, CIR = 1 Mbps

B.

PIR = 1 Mbps, CIR = 1 Mbps

C.

PIR = 10 Mbps, CIR = 1 Mbps

D.

PIR = 5 Mbps, CIR = 1.25 Mbps

E.

PIR = 1.25 Mbps, CIR = 1.25 Mbps

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

What is an SLA? (Choose two)

A.

An SLA is used to provide automated, real-time testing and alarming for throughput, latency, and jitter across a provider's network.

B.

An SLA is an agreement between a customer and a provider that dictates the treatment of customer traffic across the provider's network.

C.

An SLA allows customers to control all traffic within the service provider's network by prioritizing their traffic over others as desired.

D.

An SLA allows a customer to pre-mark traffic and ensure that traffic is treated as per the agreement within the provider's network.

E.

An SLA is a standard set of network QoS policies that a provider shares to all its customers, allowing them to better understand the treatment of traffic within the provider's network.

To manage the shared buffer space at network ports, slope policies are applied on _________ for the ingress direction, and on ________ or _________ for the egress direction.

A.

Interfaces, ports, SAPs

B.

Ports, ports, MDAs

C.

MDAs, MDAs, ports

D.

Interfaces, interfaces. MDAs

E.

MDAs, ports, interfaces

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

Which of the following traffic types is typically rate-limited by applying shaping and soft-policing on access ingress?

A.

Self-generated

B.

Real-time

C.

Best-effort

D.

Assured

How is buffer memory allocated per forwarding complex on a Nokia FP3-based IMM?

A.

512 MB ingress, 512 MB egress

B.

512 MB for network ports, 512 MB for access ports

C.

3.84 GB dynamically allocated between ingress and egress

D.

2 GB, with a minimum of 512 MB ingress and egress, and an additional 1 GB dynamically allocated

According to the SAP-egress policy configured and applied, which queue will AF traffic use?

A.

Queue 3, because it is explicitly defined in the SAP-egress policy.

B.

Queue 2, because it is explicitly configured in the queue-group template.

C.

The default, queue 1, because there is a mismatch between the mapping in the SAP-egress policy and in the queue-group template.

D.

AF traffic is dropped because there is a mismatch between the mapping in the SAP-egress policy and in the queue-group template.

A queue-group template can only contain policers (no queues) when applied under which conditions?

A.

When applied at the FP (Forwarding Path) level for access egress

B.

When applied at an access port for ingress or egress

C.

When applied at the FP (Forwarding Pass) level for access ingress

D.

When applied at the port level for network egress

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

A.

16

B.

8

C.

32

D.

48

E.

56

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.

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Total 231 questions
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