A network interface controller (NIC) is configured to couple a host to a network. The NIC coupled to the host via a host bus, and the host is configured to operate a plurality of virtual machines. The NIC is configured to receive at least one data frame, the at least one data frame including at least a source network address and indication of at least one destination network address; determine if the received data frame is a frame on which additional processing should occur; based on a result of the determining step, cause the frame to be provided to the host, via the host bus, for the host to perform the additional processing; and receive, via the host bus, the frame on which additional processing has been performed and steer the frame to a destination based on the at least one destination address.