Data Encoding
The first step towards understanding communications is to look at computer data at its base level. As all of us know computer and computer device manage, store and exchange data using electronic pulses or digital signails that comes in two varieties, the binary digit “0″ indicates the absence “OFF” and “I” indicates “ON” the presence of electric current. A series of ONs and OFFs in various combinations can be sent on the communication channels to represent any character.
Every Charcter (letter, numeral, symbol or punctuation mark) is composed of a group of bits called codes and this process is called data encoding To avoid incompatibilities between systems, the computer industryhas created a number of standards that establish relationships between bit combinations and their corresponding characters.