Cisco pays special attention to its network accessories, which are the foundation stone of the whole network system. The company offers a variety of connectivity, expansion and upgrade options to accommodate the customer specific needs. Cisco's components are easily and inexpensively upgradeable as customer requirements change.The 10Base2 expansion module is used for connection to computers, hubs, servers, and other high-speed network devices. Each module provides up to three additional 10 Mbps ports.