20-Port 10GBASE-T and 4x 10GBASE-T/SFP+ Combo Port - Layer 3 Stackable Managed Switch - Fast performance with up to 480 Gbps switching capacity - 48K MAC address table - Front Back airflow direction - Two slots for AC/DC hot-swappable power modules support 1+1 power redundancy and load sharing. Only 1 PSU supplied. - Access Control List - Port Security - Traffic Segmentation - Broadcast/Multicast/Unicast - See Datasheet for additional information - 19-inch rackmount size.