Communication Protocol

DATA COMMUNICATIONS PROTOCOL 1.1 COMMUNICATIONS PROTOCOL c ommunications protocol defines the rules for sending blocks of information (each known as a communications protocol Data building block (PDU)) from mavin node in a nedeucerk to other node. protocols are unremarkably defined in a forge manner and put up all or part of the service specified by a layer of the OSI reference model. A protocol condition defines the operation of the protocol and may in any shimmy suggest how the protocol should be implemented. It consists of three parts: 1. rendering of Protocol Control Information (PCI) format which forms the PDU header 2. explanation of procedures for transmitting and receiving PDUs 3.Definition of services provided by the protocol layers A discourse Protocol Data figure The PDUs exchanged have deuce parts: a header (also known as the Protocol Control Information (PCI)) and a committal (also known as a Service Data Unit (SDU)). The protocol does non define or constrain the data carried in the load part. It does specify the format of the PCI, defining the fields which are come along and the way in which the patterns of bits are to be interpreted.

A protocol also defines the procedures which determine how the PDU will be processed at the transmitting and receiving nodes. The procedures specify the valid values for the PCI fields, and the action be taken upon reception of each PCI value (usually based on stored control information). Examples of procedures which are implemented in protocols include: mi sunderstanding recovery (e.g. the checkpoint! procedure, the go-back-n procedure) flow control segmentation service be cured _or_ healed point selection connection management The documents which define a protocol procedures are usually large and are rarely concrete (i.e. they may not be directly translated to viable programs). They typically define the actions to be taken when a particular condition is...If you want to get a full essay, fair game it on our website: OrderEssay.net

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