Overview The HP 5120 SI Switch Series comprises intelligent, fully managed Gigabit Ethernet switches that provide high performance, high port density, & simplified installation to improve the value of your network infrastructure investment. The 5120 SI series is enhanced for the access layer in enterprise networks that require Gigabit Ethernet to the desktop or at the distribution layer in metropolitan area networks (MANs). Wire-speed forwarding delivers more effective throughput & the bandwidth necessary for mission-critical data & high-speed communications. As part of their comprehensive security control, 5120 SI switches employ 802.1X authentication to identify users who attempt to access the network. These switches are highly reliable, providing redundancy while eliminating loops in the network. They also offer a range of management protocols to simplify network administration. Features Quality of Service (Qo S) Broadcast control: allows limitation of broadcast traffic rate to cut down on unwanted network broadcast traffic Management Friendly port names: allow assignment of descriptive names to ports Connectivity Auto-MDIX: automatically adjusts for straight-through or crossover cables on all 10/100/1000 ports Performance Nonblocking architecture: up to 104 Gbps nonblocking switching fabric provides wire-speed switching with up to 77.4 million pps throughput Resiliency & high availability Separate data & control paths: increases security & performance Layer 2 switching 8K MAC address table: provides access to many Layer 2 devices Layer 3 services Address Resolution Protocol (ARP): determines the MAC address of another IP host in the same subnet; supports static ARPs; gratuitous ARP allows detection of duplicate IP addresses