Nokia Quality of Service (4A0-107) Practice Exam

Nokia Quality of Service (4A0-107) Practice Exam

The Nokia Quality of Service (QoS) exam assesses your expertise in designing, deploying, and managing QoS solutions within IP/MPLS networks using Nokia equipment. QoS is essential for delivering consistent network performance by prioritizing traffic, controlling bandwidth, and minimizing delay and packet loss.

This exam covers core QoS principles, traffic classification, policing and shaping, queuing and scheduling, and QoS monitoring and troubleshooting. You will be tested on configuring QoS policies to ensure compliance with service level agreements (SLAs) and optimize network resource use.

Who Should Take the Exam?

• Network engineers and administrators responsible for QoS implementation and management on Nokia IP/MPLS platforms.

• IT professionals working in enterprise or service provider environments aiming to enhance network performance and service reliability.

• Individuals pursuing advanced certification in Nokia’s Service Routing Certification (SRC) program.

Prerequisites

• Completion of the Nokia IP Networks and Services Fundamentals course or equivalent foundational knowledge of IP/MPLS networking.

• Basic understanding of networking concepts such as routing, switching, and MPLS.

• Familiarity with Nokia network devices and configuration principles is highly recommended.

Skills Required

• Proficiency in QoS concepts and traffic management techniques (classification, policing, shaping).

• Ability to configure queuing and scheduling mechanisms on Nokia routers.

• Knowledge of QoS monitoring tools and troubleshooting methodologies.

• Capability to design QoS policies aligned with SLA requirements.

• Analytical skills to assess network performance and optimize QoS parameters.

Exam Format

• Exam name: Nokia Quality of Service
• Exam number: 4A0-107
• Exam duration: 90 Minutes
• Exam appointment duration: 110 minutes
• Number of questions: 40
• Language: English

Course Outline

The exam covers the following topics:

Module 1 – Introduction to QoS

• Traffic Characteristics and Requirements
• The QoS Mission Statement
• IntServ and DiffServ QoS Models
• Limiting the Rate of  Customer Traffic
• QoS on the Nokia 7750 SR

Module 2 – Traffic Classification

• QoS-Related Packet Header Fields
• Configuration of Traffic Classification on SAP-Ingress
• Precedence for the Different SAP-Ingress Classification Match Criteria
• Configuration of Traffic Classification on Network Ingress
• Precedence of the Different Network Classification Match Criteria
• Default Network Policy
• Egress Traffic Classification

Module 3 – Queues and Policers

• Traffic Metering Using Token Buckets
• Using Queues as Shapers
• Default Scheduler
• Using the Fair Information Rate (FIR) to Create Additional Scheduling Priorities
• Creating Queues and Directing Traffic to Them on SAP Ingress, SAP Egress and Network Interfaces
• Priority Mode Queues vs. Profile Mode Queues
• Using Policers
• Creating Policers and Directing Traffic to Them on SAP Ingress and Egress
• Policer in Profile Capped Mode
• SAP and Network Queues vs. Hardware Queues
• Buffer Pool Allocation
• Configuring Buffer Pool Allocation
• Weighted Random Early Discard (WRED)
• Configuring and Applying Slope Policies
• Queue Groups and Traffic Redirection
• Creating Queue Groups
• Redirecting SAP Traffic to Queue Groups
• Redirecting Network Traffic to Queue Groups

Module 4 – Hierarchical Bandwidth Allocation

• Introduction
• Class Fair Hierarchical Policing (CFHP)
• Enabling CFHP for SAP Policers
• Enabling CFHP for Queue-Group Policers
• Hierarchical Scheduling (H-QoS)
• Enabling Hierarchical Scheduling for SAP Queues and Policers
• Enabling Hierarchical Scheduling for Queue Groups
• Egress Port Scheduling
• Enabling Egress Port Scheduling for Standalone SAP Queues and Policers
• Enabling Egress Port Scheduling for SAP Queues and Policers using H-QoS
• Enabling Egress Port Scheduling for Network Queues
• Enabling Egress Port Scheduling for Queue Groups

Module 5 – Marking and Remarking

• Introduction
• Marking and Remarking of Encapsulated Packets
• Marking and Remarking of Customer Packet Headers in a Layer-2 Service, in a VPRN Service and in an IES Service