Cisco is the worldwide leader in networking for the Internet. Cisco provides the broadest line of solutions for transporting data, voice and video within buildings, across campuses, or around the world. Cisco solutions ensure that networks both public and private operate with maximum performance, security, and flexibility.PRODUCT FEATURES:Efficient, high-performance bandwidth utilization - two full-duplex 1-Gbps channels provide the bandwidth required to meet the most demanding user requirements, such as faster access to Web pages, real-time video, large file transfers, and other data-intensive applications;Supports Internet-based multiservice networks based on IP. The Cisco Gigabit Ethernet implementation places the IP layer directly above the SONET layer and eliminates the overhead required to run IP over ATM over SONET;Provides the clock source for the Gigabit Ethernet link and also retrieve the clock source from the network;Can configure both an internal loopback (loops outbound traffic back toward the front card) and a network loopback (loops inbound traffic back toward the network);Hot-swappable and can be removed and replaced even when the interfaces are not shut down;Can detect the insertion and removal the Cisco 2-port Gigabit Ethernet backcard;Address filtering can indicate when to accept or discard traffic based on a match for unicast or multicast entries;Supports Ethernet 2.0, IEEE 802.3 Logical Link Control (LLC) Protocol, IEEE 802.3 Subnetwork Access Protocol (SNAP) with LLC, and 802.1q encapsulation support for IEEE VLANs, 802.3z-compliant;Allows devices at either end of the link segment to negotiate common data service functions;Can implement Layer 2 flow control using 802.3 pause frames;Interface MAC address assignment.