Specifications Type Fixed Topology Ethernet (10/100BaseTX)Ethernet (10/100/1000BaseT)Gigabit Ethernet (SFP) Maximum Port density  48 10/100 ports Uplinks 2 dual-purpose (10/100/1000 or SFP) ports Modular/Expansion Slots n/a Architecture Layer 2 Switching (basic connectivity), Layer 2 Switching (intelligent services), Voice Enabled Form Factor Fixed, Rack Mountable, Standalone/Clustering Dimensions 1.73 x 17.5 x 9.3 in. DRAM 64 MB Features Specialized Service Modules n/a Security DHCP Snooping Dynamic ARP Inspection IP Source Guard RP Rate Limiters TCP Intercept 802.1x Port Security Dynamic VLANs Private VLANs Private VLAN Edge Secure Shell SNMPv3 Unicast RPF ACLs (L2-L4) Kerberos TACACS+ RADIUS High Availability/Resilliency Hardware Redundancy External Redundant Power Supply High Availability/Resilliency PVST, Broadcast Suppression, Unicast Suppression, Mulitcast Suppression, Spanning Tree, Portfast, Uplink Fast, Backbone Fast, 802.1s, 802.1w Management Management features SPAN, RSPAN, CiscoView, Cisco Discover Protocol (CDP), Virtual Trunking Protocol (VTP), Telnet Client, BOOTP, TFTP, CiscoWorks, CWSI, RMON, SNMP, Clustering, Web-Based Management Scalability WAN Interface Support n/a Throughput 6.5 Mpps Backplane Capacity 16 Gbps Number of VLANs 255