In this slide, you will know about the basic of data communication * What is Data Communication? * Types and characteristics of Data Communication * Components of Data Communication * Computer Networks * Transmission medium * Fiber optic cable (advantage and disadvantage)

1. Data Communication

2. Topics We are covering
What is Data Communication?
Types & Characteristics of Data Communication.
Components of Data Communication
Computer Networks
Transmission Medium

3. Singnuching Marma
ID: 171-15-9366

4. What is Data Communication?
Data communications (DC) is the process of using computing and
communication technologies to transfer data from one place to another,
and vice versa.
A common example of data communications is a computer connected to
the Internet via a Wi-Fi connection.

5. Types of Data Communication
Two types of data communication:
 Local: If the communicating devices are in same place.
 Remote: If the devices are farther apart.

6. Fundamental Characteristics
Delivery: The system must deliver data to the correct destination. Data must
be received by the intended device or user and only by that device or user.
Accuracy: The system must deliver the data accurately. Data that have been
altered in transmission and left uncorrected are unusable.
Timeliness: The system must deliver data in a timely manner. Data delivered
late are useless.

7. Components of Data
Communication
Ashraful Alam
171-15-9363

8. There are 5 components in Data
Communication.
• The message
• The sender
• The receiver
• Transmission media
• Protocol

9. How 5 components works together:
MESSAGE
SENDER RECIEVER
PROTOCOL
Rule 1:
Rule 2:
Rule 3:
….
….
PROTOCOL
Rule 1:
Rule 2:
Rule 3:
….
….

10. 1: THE MESSAGE
• This is the information (Data) to be communicated.
• Can be an image, text, audio, video.
2: THE SENDER
• The sender is device or person that sends the data.
• It can be sent using a computer, telephone or camera.
3: THE RECIEVER
• The receiver is device or person that receives the data.
• It can be received using a telephone, computer or television.

11. 4: TRANSMISSION MEDIA
• This is the physical path by which massage travel from
source to destination.
• Example: Twisted pair, Coaxial cable, Fiber optic, Radio
waves.
• A protocol is set of rules that govern data communication.
• It provides agreement between sender and receiver devices.
5: PROTOCOL

12. Anik Das
ID: 171-15-9378

13. Computer Network

14. Transmission Medium
by
Shahriar tasjid Araf
171-15-9384

15. Transmission Medium
• Located below Physical Layer
• Directly controlled by Physical Layer
• Pathway for carrying information
• It can be twisted cable, fiber optics, radio waves etc.

16. Types of Transmission Medium

17. Fiber Optic Cable
• Made of glass or plastic.
• Transmits signals in the form of light.
• The core is surrounded by a less dense glass or plastic covering called
the cladding
• It is used for transmission of large volumes of data.

18. Advantage of Fiber Optic Cable
• Higher Bandwidth
• Less signal attenuation
• Immunity to electromagnetic interference
• Light weight
• Resistance to corrosive material
• We can transfer data at a rate of 1600gbps
• It can be used in cable television, telephone, internet, computer
networking, military and space applications.

19. WE are at the END
Thanks For Your Time