The ES4524D, ES4548D are Gigabit Ethernet Layer 2/4 Standalone switches featuring 24 or 48 ports; 24 or 44 RJ-45 10/100/1000 ports and 4 combo Gigabit Ethernet RJ-45/SFP ports. They are ideal for high performance server aggregations, such as enterprise data centers, to connect high-end or network attached file servers over copper ports. High speed workgroups backbone upgrades, and Gigabit to the desktop for power users. The whole stack can be managed as a single entity with a single IP address.