The Cisco SGE2000P 24-Port Gigabit Switch helps maximize system availability, with fully redundant stacking, redundant power options, & dual images for resilient firmware upgrades. The switch helps secure the network through IEEE 802.1Q VLANs, IEEE 802.1X port authentication, access control lists (ACL), denial-of-service (Dos) prevention, & MAC-based filtering. The enhanced quality of service (Qo S) & traffic-management features help ensure clear & reliable IP voice & video communications.