This topic describes QoS with respect to traffic in a network.
The ability of the network to provide better or "special" service to a set of users and applications to the detriment of other users and applications
Voice - Video - Data
Consistent, Predictable Performance
QoS is the ability of the network to provide better or "special" service to selected users and applications, to the detriment of other users and applications.
Cisco IOS QoS features enable you to control and predictably service a variety of networked applications and traffic types, thus allowing you to take advantage of a new generation of media-rich and mission-critical applications.
The goal of QoS is to provide better and more predictable network service by providing dedicated bandwidth, controlled jitter and latency, and improved loss characteristics. QoS achieves these goals by providing tools for managing network congestion, shaping network traffic, using expensive wide-area links more efficiently, and setting traffic policies across the network. QoS offers intelligent network services that, when correctly applied, help to provide consistent, predictable performance.
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