Data can be moved in two ways serial or parrallel.SERIAL DATA TRANSMISSION: is a form on transferring digital infromation. in serial system, the digital data sent one bit and a time.
indivual data peieces running on the same line or transmission.
hence PARALLE DATA TRANMISSION consestes of more line...
**** controlling the flow
what is a full duplex? its the fastest and most efficent way yo controll the movement of data between system or devices.
half duplex allows data to move in both derections but not at the same time.
- simplex data links allow the data to move in only one derection in a simplex system there is no end to reciving transmission.
signal timming
-asynchronous communincation link has no set time data to be trasnmitted or recieved.
-synchronous communication links uses agreed times for data to be transmitted adn recieved
Data speed
the speed in which decuces send data to each other is another wital factor in communications links.
-baud
-bits per second
-broadband
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