In a software-defined network, the data plane handles packets under the direction of a control plane, but the controllers are just applications that can run on standard x86 hardware. SDN controllers use a standard protocol (OpenFlow) to communicate with data plane devices. Other specialized network appliances -- like firewalls and load balancers -- that get recast as SDN applications also run on standard x86 hardware using the SDN controller to get the data plane devices to do what they need to do.
A testator must be of sound mind when making a will. In part to ensure that a testator is of sound mind, states require that the signing of a will be witnessed by multiple persons. A testator also should be making the will without duress and free of coercion from other persons.
testator (testatrix) definition: nOne who makes a will, especially one who dies and leaves a will. Because testator has come to be applied to both sexes, the use of the feminine testatrix has become obsolete. See also intestate, testacy, and testament....