The following are the major differences between product cost and period cost: 1  Product Cost is the cost which can be directly assigned to the product. 2  Product Cost is based on volume because they remain same in the unit price, but differ in the total value.
Communication protocol. In computing, a protocol or communication protocol is a set of rules in which computers communicate with each other. The protocol says what part of the conversation comes at which time. It also says how to end the communication.
In computer science, a protocol is a series of rules by which computing devices are able to communicate. The communication itself is done via a network: a medium through which individuals computers are able to connect and, in doing so, able to share data.ave. In the most basic sense of the term, a protocol is a method for accomplishing something. In practice, protocols typically refer to a standard form of conduct or etiquette: or simply, a set of specific rules.