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.
What is TESTATOR? One who makes or has made a testament or will; one who dies leaving a will. This term is borrowed from the civil law. lust. 2, 14, 5, 6. Testatoris ultima voluntas est perim- plenda secundum veram intentionem suam. Co. Litt. 322. The last will of a testator is to be thoroughly fulfilled according to his real intention. More On This Topic How to Make a Will Without Spending a Lot of Money