QoS models

Real-time applications often do not work well across the internet because of variable queueing delays and congestion losses. QoS aims to prioritize critical applications, and minimize the impact of network aberrations. We have seen from the previous discussion that we need to minimize jitter for time-critical traffic, and prioritize the other types of traffic depending upon their criticality to the business needs of the organization. This means that in case of network congestion, the business-critical applications should not be choked for bandwidth, and packets of business-critical applications should not be dropped before the packets of non-business applications are dropped. More realistically, we assign a specific amount of bandwidth to each type of traffic and ensure that the all types of traffic get their fair share of bandwidth on the network. We will discuss this...