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The Nokia Quality of Service (4A0-107)

Passing Nokia SRC Certification exam ensures for the successful candidate a powerful array of professional and personal benefits. The first and the foremost benefit comes with a global recognition that validates your knowledge and skills, making possible your entry into any organization of your choice.

4A0-107 pdf (PDF) Q & A

Updated: Mar 25, 2026

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4A0-107 PDF + Test Engine (PDF+ Test Engine)

Updated: Mar 25, 2026

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4A0-107 Test Engine (Test Engine)

Updated: Mar 25, 2026

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4A0-107 Exam Dumps
  • Exam Code: 4A0-107
  • Vendor: Nokia
  • Certifications: SRC Certification
  • Exam Name: Nokia Quality of Service
  • Updated: Mar 25, 2026 Free Updates: 90 days Total Questions: 231 Try Free Demo

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In 2026, Nokia uses variable topologies. Basic dumps will fail you.

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Nokia 4A0-107 Exam Domains Q&A

Certified instructors verify every question for 100% accuracy, providing detailed, step-by-step explanations for each.

Question 1 Nokia 4A0-107
QUESTION DESCRIPTION:

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.

Correct Answer & Rationale:

Answer: B

Question 2 Nokia 4A0-107
QUESTION DESCRIPTION:

Which of the following features of the Nokia 7750 SR prevents Head of Line blocking in the default queuing model?

  • A.

    Every forwarding class can be associated with its own queue without sharing with other forwarding classes.

  • B.

    A 3-tier scheduling policy can be applied at SAP-ingress/SAP-egress.

  • C.

    For each unicast queue in a SAP-ingress or network-queue policy, there is a separate hardware queue for each destination FFPC.

  • D.

    Policing can be deployed instead of queuing at ingress.

Correct Answer & Rationale:

Answer: C

Question 3 Nokia 4A0-107
QUESTION DESCRIPTION:

4A0-107 Q3

Based on the image shown above, and assuming that the default scheduler of the Nokia 7750 SR is on an IOM2 card, in which order will packets be scheduled?

  • A.

    Queue 6 within-CIR packets, then queue 5 within-CIR packets, then queue 5 and queue 6 above-CIR packets in round-robin.

  • B.

    Queue 6 within-CIR packets, then queue 5 within-CIR packets, then queue 5 and queue 6 above-CIR packets in biased round-robin.

  • C.

    Queue 6 within-CIR packets, then queue 5 within-CIR packets, then queue 6 above-CIR packets, and finally queue 5 above-CIR packets.

  • D.

    Queue 6 and queue 5 within-CIR packets in biased round-robin, then queue 5 and queue 6 above-CIR packets in round-robin.

Correct Answer & Rationale:

Answer: B

Question 4 Nokia 4A0-107
QUESTION DESCRIPTION:

The SAP-ingress policy shown below is applied properly to a Nokia 7750 SR. A traffic stream is received from an IP address of 192.168.2.200 with DSCP and dot1p set to EF and 4, respectively. Which forwarding class and priority level is used for this traffic stream?

4A0-107 Q4

  • A.

    FC H1, high

  • B.

    FCH1, low

  • C.

    FCAF, high

  • D.

    FCAF, low

Correct Answer & Rationale:

Answer: A

Question 5 Nokia 4A0-107
QUESTION DESCRIPTION:

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

Correct Answer & Rationale:

Answer: D

Question 6 Nokia 4A0-107
QUESTION DESCRIPTION:

Which of the following statements about the DiffServ and IntServ QoS models is FALSE?

  • A.

    IntServ uses a protocol like RSVP to provide QoS guarantees on a per-flow basis.

  • B.

    DiffServ groups multiple microflows into bigger streams called macro flows.

  • C.

    Intserv requires that network routers allocate resources for thousands of individual flows.

  • D.

    Diffserv classifies packets into forwarding classes only at the first network hop.

Correct Answer & Rationale:

Answer: D

Question 7 Nokia 4A0-107
QUESTION DESCRIPTION:

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

  • A.

    Classification

  • B.

    Marking

  • C.

    Queuing

  • D.

    Congestion management

  • E.

    Scheduling

Correct Answer & Rationale:

Answer: D

Question 8 Nokia 4A0-107
QUESTION DESCRIPTION:

Which of the following about the process of queuing self-generated traffic in the Nokia 7750 SR is TRUE?

  • A.

    Ingress traffic is stored in IOM queues and egress traffic is stored in CPM queues.

  • B.

    Ingress traffic is stored in CPM queues and egress traffic is stored in IOM queues.

  • C.

    It is always stored in CPM queues.

  • D.

    It is always stored in IOM queues.

Correct Answer & Rationale:

Answer: B

Question 9 Nokia 4A0-107
QUESTION DESCRIPTION:

On the Nokia 7750 SR, what is a slope policy used for?

  • A.

    Defining the slope of the TCP slow-start mechanism for self generated traffic.

  • B.

    Defining the slope of the scheduling rate per forwarding class when using HQoS.

  • C.

    Defining the high and low slope values when deploying buffer admission control for UDP traffic in the committed buffer pool.

  • D.

    Defining the high and low slope values when deploying buffer admission control for TCP traffic in the shared buffer pool.

  • E.

    Defining the high and low slope values when deploying buffer admission control for TCP traffic in the committed buffer pool.

Correct Answer & Rationale:

Answer: D

Question 10 Nokia 4A0-107
QUESTION DESCRIPTION:

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.

Correct Answer & Rationale:

Answer: C

A Stepping Stone for Enhanced Career Opportunities

Your profile having SRC Certification certification significantly enhances your credibility and marketability in all corners of the world. The best part is that your formal recognition pays you in terms of tangible career advancement. It helps you perform your desired job roles accompanied by a substantial increase in your regular income. Beyond the resume, your expertise imparts you confidence to act as a dependable professional to solve real-world business challenges.

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Nokia 4A0-107 SRC Certification FAQ

What are the prerequisites for taking SRC Certification Exam 4A0-107?

There are only a formal set of prerequisites to take the 4A0-107 Nokia exam. It depends of the Nokia organization to introduce changes in the basic eligibility criteria to take the exam. Generally, your thorough theoretical knowledge and hands-on practice of the syllabus topics make you eligible to opt for the exam.

How to study for the SRC Certification 4A0-107 Exam?

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Finally, it should also introduce you to the expected questions with the help of Nokia 4A0-107 exam dumps to enhance your readiness for the exam.

How hard is SRC Certification Certification exam?

Like any other Nokia Certification exam, the SRC Certification is a tough and challenging. Particularly, it's extensive syllabus makes it hard to do 4A0-107 exam prep. The actual exam requires the candidates to develop in-depth knowledge of all syllabus content along with practical knowledge. The only solution to pass the exam on first try is to make sure diligent study and lab practice prior to take the exam.

How many questions are on the SRC Certification 4A0-107 exam?

The 4A0-107 Nokia exam usually comprises 100 to 120 questions. However, the number of questions may vary. The reason is the format of the exam that may include unscored and experimental questions sometimes. Mostly, the actual exam consists of various question formats, including multiple-choice, simulations, and drag-and-drop.

How long does it take to study for the SRC Certification Certification exam?

It actually depends on one's personal keenness and absorption level. However, usually people take three to six weeks to thoroughly complete the Nokia 4A0-107 exam prep subject to their prior experience and the engagement with study. The prime factor is the observation of consistency in studies and this factor may reduce the total time duration.

Is the 4A0-107 SRC Certification exam changing in 2026?

Yes. Nokia has transitioned to v1.1, which places more weight on Network Automation, Security Fundamentals, and AI integration. Our 2026 bank reflects these specific updates.

How do technical rationales help me pass?

Standard dumps rely on pattern recognition. If Nokia changes a single IP address in a topology, memorized answers fail. Our rationales teach you the logic so you can solve the problem regardless of the phrasing.