I am searching about the function of service primitives for execution of protocol in protocol suite got this Service Primitives were formalised for each protocol in OSI reference model.
Each protocol which communicates in a layered architecture (e.g. based on the OSI Reference Model) communicates in a peer-to-peer manner with its remote protocol entity.Communication between adjacent protocol layers (i.e. within the same communications node) are managed by calling functions, called primitives, between the layers. There are various types of actions that may be performed by primitives. Examples of primitives include: Connect , Data, Flow Control, and Disconnect.
but could not find the suitable example to explain the same