Quality of Service
QoS refers to the ability of a network to provide improved service to selected network traffic over various underlying technologies including ATM, Ethernet and 802.1 networks, SONET, and IP-routed networks. In particular, QoS features provide improved and more predictable network service by implementing the following services:
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Supporting guaranteed bandwidth
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Improving loss characteristics
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Avoiding and managing network congestion
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Shaping network traffic
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Setting traffic priorities across the network