TODAY’S EVERGHANGING & BUSY WORLD

• Today’s fast world demands better, secure and most of all FAST ways of communication
• Gone are the days when you had to wait a couple of weeks to get a letter from USA
• Why wait ONE week when you can get the information you require in just a split of a second, using what we know by the name of “DATA COMMUNICATION”.

HOW TO ACHIEVE THIS?

• How to achieve this ACCURACY, SECURITY and SPEED for the transfer of this information?
• What HARDWARE, and the SOFTWARE is needed ?
• And, what should be the MEANS of sending this info?

ARE SOME OF TOPIC WE WILL BE EXPLORING DURING THE COURSE OF
OUR STUDY

DATA COMMUNICATION

• When we communicate , we share information
• Information can be LOCAL or REMOTE
• Between Individuals LOCAL communication occurs face to face
• REMOTE communication occurs over a long distance
• When we refer to COMPUTER SYSTEMS, Data is represented in the form of Binary Units (Bits) in the form of Zeros (0’s) and One’s (1’s)
• Also the entities can most of the times be considered to be COMPUTERS

Data Communication Definition (Modified)

Therefore , our earlier definition can easily be modified to:
“Data Communication is the exchange of data (in the form of 0’s and 1’s)
between two devices (computers) via some form of the transmission medium.”

LOCAL and REMOTE Data Communication

LOCAL
Data communication is considered to be local if the communicating devices
are present in the same building or a similarly restricted geographical area
REMOTE
Data Communication is considered remote, if the devices are farther apart.