CRS328-24P-4S+RM is a 28 independent port switch, it has 24 Gigabit Ethernet ports, which offer different power outputoptions: Passive PoE, low voltage PoE, 802.3af/at (Type 1 “PoE” / Type 2 “PoE+”) with auto-sensing. The four SFP+ portsprovide up to 10 Gbps connectivity options via either optical fiber or Ethernet modules (not included).CRS328-24P-4S+RM comes in a 1U rackmount case with 100-240 V AC 500 W power supply built-in. The deviceconsumes up to 44 W leaving guaranteed 450 W (3x150 W per every 8 Ethernet ports) to power your PoE devices. Eachport can provide up to 30 W of power with any power output option you choose.The device has a “Dual boot” feature that allows you to choose between two operating systems - RouterOS or SwOS. Ifyou prefer to have a simplified operating system with only switch specific features, use SwOS. If you would like the abilityto use routing and other Layer 3 features in your CRS, use RouterOS. You can select the desired operating system fromRouterOS, from SwOS or from the RouterBOOT loader settings. All the feature set comes with disruptive price, providingbest price/performance on the market.