An apparatus accesses a resource in a computer system. The resource is accessible at a physical memory address (49) of the computer system. The apparatus comprises means for determining at least one identity parameter for the resource and means for storing a translation (261.1, 26.2, . . . , 26.n) between the at least one identity parameter and the physical memory address (49) in a network interface table (26). The network interface table (26) is accessible by a Remote Direct Memory Access enabled network interface (48) of the computer system.