Add four gigabit network interfaces to a desktop pc or server with an available pci express x4 slotr r protect critical networked systems with four redundant independent gigabit ethernet portsr optimize network traffic with support for advanced features such as jumbo frames and vlan taggingr maximize your virtualized servers networking efficiency with dedicated portsr backed by a startechcom 2 year warranty and free lifetime technical supportr the st1000spex42 4 port ethernet card is an ieee