Four optional uplink network modules with GE or 10GE ports. Dual redundant, modular power supplies and fans. Media Access Control Security (MACsec) hardware-based encryption. Flexible NetFlow and switch-to-switch hardware encryption with the Service Module uplink. USB Type-A and Type-B ports for storage and console respectively and an out-of-band Ethernet management port. StackWise PlusCisco StackPower^TM technology: An innovative feature and industry first for sharing power among stack members. Cisco StackWise Plus technology for ease of use and resiliency with 64 Gbps of throughput. Investment protection with backward compatibility with all other models of Cisco Catalyst 3750 Series Switches