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.
A protocol is a set of rules by which computers communicate with each other across a network. A protocol is a convention or standard that controls or enables the connection, c â¦ ommunication, and data transfer between computing endpoints, and may be implemented by hardware, software or a combination of the two.