The IEEE 802. 1w Rapid spanning tree (RSTP) also allows immediate recovery from failed links by sending packets via a backup link path. Hassle-free Network Management and Stacking Capability of Up to 24 Units The ZyXEL 4500 Series provides various network management options for administrators to choose to manage the switch using friendly Web-based configuration or convenient text-based CLI (Command Line Interface), and it also supports SNMP-based, centralized management software for switch maintenance to be done remotely. On the other hand, the 4500 Series supports the ZyXEL-exclusive iStackingTM clustering management technology that works across different floors and routing domains to locate other iStacking-capable switches in the same management cluster, allowing administrators to manage 24 switches with one single IP. This not only greatly reduces operating costs, but also offers more flexible maintenance to ZyXEL Switches...