Quality of Service (QoS) by Arash Deljoo

person icon Arash Deljoo

Quality of Service (QoS) by Arash Deljoo

Concepts , Configuration and Verification

updated on icon Updated on Nov, 2023

language icon Language - English

person icon Arash Deljoo

architecture icon CCNP Enterprise,CCNP CCIE

Lectures -34

Resources -77

Duration -14.5 hours


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Course Description

Quality of service (QoS) is the description or measurement of the overall performance of a service, such as a telephony or computer network, or a cloud computing service, particularly the performance seen by the users of the network. To quantitatively measure quality of service, several related aspects of the network service are often considered, such as packet loss, bit rate, throughput, transmission delay, availability, jitter, etc.

In the field of computer networking and other packet-switched telecommunication networks, quality of service refers to traffic prioritization and resource reservation control mechanisms rather than the achieved service quality. Quality of service is the ability to provide different priorities to different applications, users, or data flows, or to guarantee a certain level of performance to a data flow.

Quality of service is particularly important for the transport of traffic with special requirements. In particular, developers have introduced Voice over IP technology to allow computer networks to become as useful as telephone networks for audio conversations, as well as supporting new applications with even stricter network performance requirements.

QoS is sometimes used as a quality measure, with many alternative definitions, rather than referring to the ability to reserve resources. Quality of service sometimes refers to the level of quality of service, i.e. the guaranteed service quality. High QoS is often confused with a high level of performance, for example high bit rate, low latency and low bit error rate.


What will you learn in this course:

  • QoS Overview
  • QoS Tools and Architectures
  • MQC, QPM, and AutoQoS
  • Classification and Marking
  • Congestion Management
  • Traffic Policing and Shaping
  • Congestion Avoidance Through Drop Policies
  • Link Efficiency Tools
  • LAN QoS


What are the prerequisites for this course?

  • You need to have CCNA Level knowledge.
  • You can implement all scenarios of this course in GNS3 and EVE-NG.
Quality of Service (QoS) by Arash Deljoo


Check out the detailed breakdown of what’s inside the course

Quality of Service [QoS] Fundamentals
3 Lectures
  • play icon Quality of Service [QoS] Fundamentals 01:17:58 01:17:58
  • play icon QoS necessity and Characteristics 01:20:48 01:20:48
  • play icon QoS Implementation Models 32:18 32:18
QoS Classification and Marking
3 Lectures
Congestion Management
14 Lectures
Congestion Avoidance
7 Lectures
Link Efficiency Tools
7 Lectures

Instructor Details

Arash Deljoo

Arash Deljoo

Arash is an experienced Cisco engineer with 15 years of experience working in network engineering, communications, and education–particularly in training with E-learning companies. He earned a MSc in power electrical engineering from Tehran Polytechnic.  He produces training courses in Persian and English.

The total number of his students in face-to-face and online teaching courses has been more than 10,000.

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