1. In a computer network comprising a computer device coupled to a bus, a method for the computer device to obtain access assurance information corresponding to a direct memory access transaction sent over the computer network, the method comprising: providing an access space for the direct memory access transaction within a memory space associated with the bus; providing an assurance space corresponding to the access space within the memory space associated with the bus; and reading from the assurance space to obtain the access assurance information corresponding to the direct memory access transaction.