Introduction to Protocol

Introduction to Protocol In computer Networks, communication occurs between two entities in different systems. o    Entity means is anything sending and receiving information o    SYSTEM is a tangible object that containing more than one entities two entities in different systems               cannot just sent data and expect to be understood.  PROTOCOLS "Protocol is a set of rules governing communication" o    Two  computers  cannot  just  send  bit  streams  to  each  other  and  expect  to  be understood o    Entities must agree on a PROTOCOL Protocol defines:    What is Communicated?    How it is Communicated?    When it is Communicated? KEY elements of a PROTOCOL ™   Syntax:    This represents the Structure or the format of the Data    and meaning the order in which data is presented ™   Semantics:    Refer to the Meaning of each section of bits    How is a particular pattern to be interpreted?    What action should be taken based on interpretation? ™   Timing Refers to 2 characteristics:    When data should be sent?    How fast it should be sent?