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