Data transmission is 6 type:
1. Analog vs digital
2 .Bandwidth
3. Serials Vs Parallel
4. Transmission timing
5. Transmission directions
6.Circuit switched, Packet‐Switched, and Broadcast
   Connections


1.Analog
-Transmission uses signals that are exact replicas of a sound wave or image.


2.Digital
-Transmission the signals are converted into a binary code, which consists of two elements.

example of analogue and digital system:

3.Bandwidth
-The amount of data that can be transmitted in a fixed amount of time.For digital devices, the bandwidth is usually measured in bits per second(bps), Megabits persecond (Mbps). Medium with higher bandwidth deliver data
faster.


4.serial and parallel
•Serial
 data sent  one bit at a time,one after another a long a single path
• Parallel
data  is sent at least one byte at a time, each bit in  the byte taking separate path

5.Transmission Timing
a)Synchronous transmission
 Data organised into blocks or groups and transferred at regular specified interval


b)Asynchronous transmission
  the process where transmitted data is encoded with start and stop bits, specifying the beginning     and end of each character.Data sent without being synchronised


c)Isochronous transmission
data is sent  at the same time as other related data to support certain types of real time applications e.g streaming voice, video and music.

data transmission mode