The Cisco Catalyst 4948 48-Port Switch (WS-C4948-S) is a wire-speed, low-latency Layer 2 to 4, 1-rack-unit (1RU), fixed-configuration switch for rack-optimized server switching. The Cisco Catalyst 4948 48-Port Switch is based on the Cisco Catalyst 4500 Series hardware and software architecture, and offers a reliable, fast network for low-density, multilayer aggregation of high performance servers and workstations. Cisco Catalyst 4500 Series switches use dedicated ternary content addressable memory (TCAM) resources to deliver high performance and high network scalability. 64,000 TCAM resources enable the Cisco Catalyst 4948 48-Port Switch to provide concurrent service provisioning so users experience continuous optimal performance while other network functions continue to operate. The Cisco Catalyst 4948 48-Port Switch can be configured and managed to deliver device, VLAN, traffic, and policy management. Use web-based management tools to isolate error conditions and deploy software to your network. Quality of Service (QoS) and traffic management are managed with per port QoS configuration and support for four queues per port in hardware and strict priority queuing. Dynamic Buffer Limiting (DBL) prevents congestion in the network. The Cisco Catalyst 4948 48-Port Switch features multi-level security. IEEE 802.1X technology provides user authentication, accounting, authentication failure, a private VLAN assignment, private guest VLAN, RADIUS-supplied timeout, MAC-Auth-Bypass, and inaccessible authentication bypass. Port security, port security for PVLAN ports, trunk port and sticky port security provide security at a variety of levels. Cisco Network Admission Control NAC Layer 2 IP inaccessible authentication bypass, trusted bypass, ACLS on all ports with no performance penalty, and DHCP snooping, Option 82, Option 82, and Option 82 pass-through provide additional security features. Predictable performance is based on a 96 Gbps switching fabric. Software based learning improves your system at a rate of 500 hosts per second. Power supply options give you flexible configuration options and protect your productivity during power outages. You can mix AC and DC power supplies for deployment flexibility or for redundancy during power outages. The LED display allows for the monitoring of a network easily with indicators displaying data terminal equipment, The Cisco Catalyst 4948 48-Port Switch provides 96 Gbps switching capacity with 72 mpps throughput. The Cisco Catalyst 4948 Switch can be configured for a maximum of 48 10/100/1000 LAN ports (RJ-45 socket) and 4 Gigabit Ethernet (fiber) ports. The uplink optic type is 4 SFP optics. The Cisco Catalyst 4500 Series multilayer switching functions on an IP Base and Enterprise Services options. The shared buffer is 16 MB. The CPU is 266 MHz. The Synchronous Dynamic RAM (SDRAM) is 256 MB. Layer 3 provides 28,000 multicast entries and layer 2 provides 16,000 Multicast entries. You can employ 2000 Switched Virtual Interfaces (SVIs), 32,000 Security and QoS hardware entries, and 32,000 MAC addresses. The Switched Port Analyzer (SPAN) features 2 ingress and 4 egress ports. The Cisco Catalyst 4948 (WS-C4948-S) Switch offers 48 ports of wire-speed 10/100/1000BASE-T with four alternative wired ports to accommodate optional 1000BASE-X Small Form-Factor Pluggable (SFP) optics. The Cisco Catalyst 4948 (WS-C4948-S) 48-Port switch enables small business computers, routers, and office equipment to be linked on a secure network with multiple capabilities.