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Cisco MDS 9500 Series Multilayer Directors support two different load-balancing algorithms across PortChannels . Plus , the entire series performance and features are easily field-upgradeable by simply changing the supervisor engine . Each firm in our business experienced a round ( or two or four ) of cutbacks , downsizings and wrenching changes in atmosphere . Configuration of QoS is greatly simplified through automatic QoS ( Auto QoS ) , a feature that detects Cisco IP phones and automatically configures the switch for the appropriate classification and egress queuing . In essence , they told us that the Internet helps them navigate their way through school and spend more time learning in depth about what is most important to them personally.Internet-savvy students describe dozens of different education-related uses of the Internet . Also , all major components are field-upgradeable . With automatic medium-dependent interface crossover ( Auto-MDIX ) detection support , you do not have to worry about incorrect cable types . IVR allows selective transfer of data traffic between specific initiators and targets on different VSANs while maintaining isolation of control traffic within each VSAN . Server clusters have unique operational requirements and should be served by a slightly different design approach . Allows different people to use the same PC and have different capabilities , so that users only get their assigned privileges no matter how they are logged onto the network-preventing unauthorized access .