1. LACTURE # 1
DATA COMMUNICATION
CONTEXT:-
COMPONENTS OF DATA COMMUNICATION
FUNDAMENTAL CHARACTERISTICS OF COMMUNICATION
2. DATA COMMUINICATION
DATA
► Data is a Collection of Raw Facts And Figures.it May Consists of
Text, Graphics and Sounds Etc.
DATA COMMUNICATION
► Data Communication is a process of Trans-
ffering Data Electronically From One
Place To Another.
► Exchange of digital information between
two digital devices is Known As
Data Communication.
Mr. X
3. Components Of Data Communication
MESSAGE.
► The Message is The Data or Information To Be Communicated.
► It May Consists of Text, Graphics, Sounds and Videos or The Combination
of All.
SENDER.
► A device That Sends the Message is
Called SENDER.
► It is also Called Source or Transmitter.
► The Sending Device Can Be Computer , Fax machine or Mobile Phone.
► Computer is usually Used as Sending Device in Communication System.
Mr. X
4. RECEIVER.
► A device That Receives The Message
is Called Receiver or Receiving Device.
► It is Also Called SINK.
► The Receiving Device Can Be Computer,
Fax Machine or Mobile Phone.
► A Computer is Usually Used As Receiving
device in Communication System.
TRANSMISSION MEDIUM.
► Transmission Medium is Used To
carry Message From One Place To
Another.
► It is Also Called Transmission Channel.
► The Transmission Medium Can Be a
Physical Cable or Wireless Connection.
Mr. X
5. 1) DELIVERY:
The System must sent data to correct Destination. If the System doesn’t
Do so the data will be use-less.
2)ACCURACY:
The System should send Data Accurately. if The System have send some
other data than it will be un-useful and waste.
3)TIMELINESS:
This is The Most Important component of the data Communication
Because Data Is Un-useable after the Requirement Time.So system should
send the data in time to make it in use.
Mr. X
FUNDAMENTAL CHARACTERISTICS.
