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.
Protocol. When computers communicate with each other, there needs to be a common set of rules and instructions that each computer follows.A specific set of communication rules is called a protocol.Because of the many ways computers can communicate with each other, there are many different protocols -- too many for the average person to remember. Some examples of these different protocols include PPP, TCP/IP, SLIP, HTTP, and FTP.rotocol. When computers communicate with each other, there needs to be a common set of rules and instructions that each computer follows.