The D-Link xStack DES-3228PA Switch is designed to provide Power Over Ethernet (PoE) technology convergence with traditional Layer 2 data access switching, emphasizing on security, performance, and resiliency. Featuring the latest stacking technology from D-Link, the xStack DES-3228PA can stack up to 6 units, providing up to 150 ports under single IP management. It provides 24 built-in 10/100Mbps ports and 4 Gigabit copper ports, including two combo SFP slots for easy, flexible connection to fiber-based Gigabit or 100BASE-FX media. All 24 10/100 ports are PoE-enabled and are capable of providing up to 15.4 Watts per port. With the optional redundant power supply, DES-3228PA is an ideal solution for deployment at the edge of the network for today's multimedia applications. The DES-3228PA is equipped to handle many of today's emerging security vulnerabilities previously delegated to only stand-alone firewalls. It incorporates the D-Link Safeguard Engine, which consists of built-in ACLs for filtering out such threats as Denial of Service (Dos) attacks, Trojan Horses, Worms, and more. The D-Link Safeguard Engine also protects the xStack switch against attacks on its CPU, ensuring maximum utilization. Other access rules can also be set up to restrict network access and 802.1x authentication can be used to verify user identity. In addition, port-based security can also be set up to protect the integrity of a network. The D-Link xStack DES-3228PA also supports a robust COS/QoS, supporting 4 priority queues for 802.1p/ToS DiffServ, with classification and marking, based on MAC SA/DA, IP SA/DA, and/or TCP/UDP. It also provides extensive support for GARP/GVRP, 802.1Q, and port-based VLANs for up to 256 groups per device. The D-Link xStack DES-3228PA supports "Shortest-Path" switching, which improves resiliency, uptime, and network efficiency. It also supports an optional Redundant Power Supply. For increased reliability and scalability, the DES-3228PA supports 802.3ad Link Aggregation and 802.1w Rapid Spanning Tree. The DES-3228PA features a variety of network management options including console CLI, Telnet, Web GUI, SNMPv1/v2/v3, and RMON. With a variety of advanced traffic management options including Bandwidth Control, Broadcast Storm Control, Private VLANs, and support for IGMP Snooping your network will be more efficient and manageable. D-Link exclusive Distributed Network Architecture (DNA) stacking technology is also supported, which allows up to 6 D-link DES-3228PA switches to be stacked together and managed as a single unit, regardless of the physical environment or location. Wherever the location, factory, warehouse, campus, small office, or enterprise facility, the challenge and cost of running power to difficult-to-reach locations in order to meet network design can become a disruption to businesses and a drain on resources. To solve this problem, the DES-3228PA is equipped with 24 10/100BASE-TX ports that support the IEEE 802.3af PoE protocol. The DES-3228PA is designed to inject up to 15.4 Watts of power per port on all 24 RJ-45 ports for a total of up to 370 Watts of available power to support IP Phones, Access Points, Cameras, and more.