Generally it'll at least be limited to 1 Gbps per TCP socket, and that's assuming your switch operates at layer 4 (many don't). A layer 3 switch will (or should) select a port based on IP src/dst addresses only, in which case all connections from the same src/dst pair will traverse the same port.olav said:Let's say I have two servers where both has each one Intel 1Gbps network cards with 4 ports. Can they communicate at 4 Gbps in one session? Or is it still 1Gbps per session?