Cisco c3750switch 1) 40 high performance 10 / 100 auto-negotiation RJ- 45 ports plus 2 optical ports (SM / MM) 2) One RS-232 interface to manage switch 3) Electrical port auto MDI / MDIX switch 4) Provide maximum bandwidth to 5. 2gbps, 100% data transmit rate 5) Supports VLAN and trunking 6) Dynamic buffer memory: 8MB 7) MAC address list: 12K