New Training: Describe DiffServ

In this 5-video skill, CBT Nuggets trainer Jeff Kish jumps into the Differentiated Services (DiffServ) Quality of Service (QoS) model.

Gain an understanding of important concepts such as classification and marking, queuing, scheduling, and techniques for congestion management and avoidance. Watch this new Cisco training.

Learn Cisco with one of these courses:

• Quality of Service (QoS) for Cisco Voice and Cisco Video Training

• Cisco CCNP Collaboration Core

This training includes:

• 5 videos

• 48 minutes of training

You’ll learn these topics in this skill:

• Intro

• Classification and Marking

• Queuing and Scheduling

• Congestion Management

• Review and Quiz

A Brief Overview Of The DiffServe QoS Model

One of the ways to ensure that applications can utilize network bandwidth properly is through QoS policies. QoS policies dictate how much bandwidth applications can use. They help ensure that networks can meet the required capacity. Before implementing QoS policies, though, network administrators need to understand the three different types of QoS methods to select the best scheme for their requirements. One of those QoS methods is DiffServe.

DiffServe stands for differentiated services. It's largely the complete opposite of how the IntServe model works. The IntServe model works by requesting network resources before traffic is sent. The entire flow of that traffic needs to be guaranteed by the network before QoS can be guaranteed with the IntServe model.

Instead, the Diffserve model requests guaranteed usage at each node in the network as traffic arrives at that node. This has pros and cons. Because QoS is checked at each node of the network it’s not guaranteed that network traffic will have reserved resources through each hop in the network. This has the benefit of not requiring as many computing resources at each node as well as a simpler QoS implementation.