The RTL8211EG-VB-CG is an Ethernet Integrated Circuit (IC) manufactured by Realtek. It is a quad port Gigabit single-chip transceiver in a Quad Flat No-Lead (QFN) package with a 9x9x0.5mm form factor. The IC supports 10BASE-T, 100BASE-TX, and 1000BASE-T media access control (MAC) and physical layers, as well as supporting Auto-Negotiation and Wake-on-LAN technologies for advanced networking features. It is designed for an extended temperature range, making it suitable for industrial systems and automotive applications. This IC is compliant with the RoHS directive, and is a cost-effective solution for high-speed Ethernet applications.