This article or the following section is not adequately provided with supporting documents ( e.g. individual evidence ). Information without sufficient evidence could be removed soon. Please help Wikipedia by researching the information and including good evidence.
A network protocol consists of two to three protocol elements . These elements are mostly:
Header : control information and processing options,
Data part: user data that the protocol carries with it, and
Trailer (tail): error-checking measures that are usually already included in the header → therefore only optional.
