Cisco Catalyst 1900 and 2820 Enterprise Edition switches provide high-capacity links and stackability through Fast EtherChannel port aggregation. Fast EtherChannel can deliver up to 400 Mbps of bandwidth per link in full duplex mode, providing optimal uplinks to high-speed backbones and high-performance servers. The switches also deliver simplified administration, enhanced security, and broadcast control through ISL VLAN trunking. The Catalyst 1900 and 2820 Enterprise Edition series switches provide enhanced security by enabling centralized access control through TACACS+. Multilevel console passwords enable implementation of a secure, flexible access control policy for the switch console. For ease of deployment in a large network, Enterprise Edition switches support autoconfiguration of multiple switches through a boot server and can be managed via the widely used Cisco IOS command line interface (CLI). Used in conjunction with Cisco routers, chassis switches, and access servers, Enterprise Edition switches provide unmatched network performance, management control, and ease of use in a Cisco end-to-end network.In addition to industry-leading software functionality, the Catalyst 1900 and 2800 families of switches are available with a broad range of configurations to meet specific network requirements. The Catalyst 1900 family is available with either 12 or 24 10BaseT ports, with two high-speed Fast Ethernet uplinks configurations, including two 100BaseTX ports, two 100BaseFX fiber ports, or one of each. The Catalyst 2820 family offers 24 10BaseT ports, with several plug-in modules, including Fast Ethernet 100BaseTX, 100baseFX ports, ATM 155-Mbps ports, and FDDI fiber or UTP ports.