Protocols and rules By Karl Taylor

Protocols and rules By Karl Taylor

1. Defined as a set of rules

   • 'A set of rules that govern the transmission of data'

2. Rules

   • In data transmission the machines involved need to know how they should carry out the task
   • The devices involved should agree on what the bit rate should be
     • If one device is transmitting at a diffirent pace then the data pulses will get confused
   • Must have the same parity and echoing back must agree on if the data needs to be resent
   • Two Parts:
     • Logically Based Parts
       • Being applied to the data
     • Physically Based Parts
       • Being applied to the methods used for communication
         • Such as: are we going to use wireless or cables? And if wireless then what frequencies will it use
     • Physical can affect logical
       • The type of communication used may limit the types of data transmission available
       • The protocol can be easily changed by changing one layer and then all the layers connected to it will be changed