... learned:• That a QoS-enabled infrastructure is necessary in both the WAN and campus to minimize quality reduction from loss, delay, and jitter.• How QoS tools protect voice traffic from data ... differentiator in achieving QoS. © 2000, Cisco Systems, Inc. 1© 2000, Cisco Systems, Inc. Campus Quality of Service© 2000, Cisco Systems, Inc. 17© 2000, Cisco Systems, Inc. www.cisco.com econ_387_05_010.pptCampus ... Precedence• Define Differential Service Code PointThe objective of this module is to define the quality of service (QoS) tools which must be implemented to provide a voice-enabled transport service...