Wednesday, October 3, 2018

networking: CoS vs. QoS

CoS - Class of Service
QoS - Quality of Service

NOT a layer 2 vs layer 3 differentiation.
NOT a guarantee for traffic (dependent upon each hop respecting the request).


QoS - Quality of Service: an umbrella term which covers the use of features such as traffic policy, shaping, and advanced queuing mechanisms.

CoS - Class of Service: a form of QoS applied at layer 2 (ex: PCP) and layer 3 (ex: DSCP).


Part 1, 2


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