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This software upgrades a 3Com SuperStack 3 Switch 4400 SE 24-Port to the same feature set as a 3Com SuperStack 3 Switch 4400 24-Port, with Quality of Service (QoS) traffic control, edge security, and configuration enhancements. Advanced multilayer traffic classification, prioritization, and filtering help maintain service levels for real-time applications such as voice over IP (VoIP). User authentication improves network edge security, while the switch configuration backup and restore function saves administrative costs.Enhanced QoS capabilities - including support for multilayer traffic classification, IEEE 802.1p prioritization, DiffServ marking, and wirespeed application filtering and blocking - optimize the performance of delay-sensitive, real-time applications. Automatic identification and prioritization for 3Com NBX Networked Telephony Solution VoIP traffic keeps voice quality high no matter what other applications are running on the network. Edge security with IEEE 802.1x Network login authenticates all users as they enter the network through the RADIUS (remote access dial-in user service) control protocol server, keeping unauthorized users from accessing network resources and data. Switch configuration backup and restore eases administration when configuring, replacing, recovering, and moving network devices. Transparent webcache redirection improves web performance and reduces network administration.