Protocols are sets of rules created by humans to facilitate communication between different entities. The protocol must be able to determine that something went wrong so it can take appropriate action. For instance, if a car crashes due to malfunctioning software, the protocol must be able to determine that something went wrong so it can take action to prevent further crashes. The actions could include sending out another car with faulty software or temporarily halting production of all cars with faulty software until repairs are made. Furthermore, if there are multiple ways to perform a task in an application— such as different routes in an electronic game— the protocol must be able to determine which route to use so it can deliver its intended message accurately.
Another aspect of determining what went wrong is deciding what information is needed to fix the problem. For instance, if there’s poor customer service on one of your phone calls because your server ran out of space, you may need to know what number you're calling so your call can reach a person instead of voicemail. The protocol or program must also be able to decide which data will be used for this task since different systems store different information such as customer names and account numbers in databases. In addition, it must be able to transmit that data correctly so it reaches its destination without error or corruption.
Overall, protocols perform several important functions for applications including ensuring quality control during conversion, identifying problems, and choosing appropriate information for fixing those problems. Therefore, when designing or modifying existing protocols, designers should think about how these key elements work and how they could best help applications function as intended.
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