The document explains data communication, defining it as the transfer of data using technology and outlining its types: local and remote. It details the fundamental characteristics of data communication, including delivery, accuracy, and timeliness, along with its 5 key components: message, sender, receiver, transmission media, and protocol. Additionally, it discusses transmission mediums, specifically fiber optic cables, highlighting their advantages such as high bandwidth and immunity to interference.

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
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