The RTL8366S-GR is a single-chip 5-port Gigabit Ethernet switch controller from Realtek. It is compliant with IEEE 802.3, 802.3u, and 802.3x standards and supports full line-rate forwarding on all ports. The RTL8366S-GR is a single-chip solution that integrates the TCP offload engine (TOE) and QoS features for efficient switching, filtering, and QoS management. It also has a Hi-Q layer-2 MAC for Gigabit Ethernet switch support. Other features include IEEE 802.1Q VLAN, IEEE 802.1p QoS, IEEE 802.3ad Link Aggregation, 802.1x security, rate-limiting and port mirroring. The RTL8366S-GR is designed to provide maximum flexibility and performance in Gigabit Ethernet switching.