VMQ (Virtual Machine Queue)

VMQ (Virtual Machine Queue) is a type of hardware packet filtering that delivers packet data from an outside virtual machine network directly to a virtualized host operating system. 

VMQ works by allowing a network interface controller (NIC) to transfer incoming frames directly to the NIC’s receive buffer using Direct Memory Access (DMA). This simplifies the overheard involved in routing packets and reduces the need for copying them from the management operating system (OS) to the virtual machine (VM).

Rather than one processor handling all of the network data exchanges, different processors can process packets for different virtual machines with VMQ. This eliminates the dependence on driver-based traffic exchanges and improves the transfer of network traffic (including TCP/IP, iSCSI and FCoE). 

VMQ can be enabled on Windows Server 2008 R2 as long as the Hyper-V server role is installed.