8. Deploying Quality of Service

Bandwidth is a scarce commodity for most broadband subscribers. As with anything that is in limited supply, there needs to be a way of effectively regulating and managing such a resource. Whereas 256kbps was considered insufficient capacity a few years ago, 10Mbps will take its place as the “slow band” access speed. In a few years, it will be 50Mbps. For some fortunate customers, bandwidth is in abundant supply. But for the majority, quality of service (QoS) differentiation is a feature often used in most broadband networks.

The terms class of service (CoS) and QoS are commonly used interchangeably, but in the past they defined subtly different things. QoS covers broader network performance aspects than CoS. CoS ...

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