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Data Transmission - Coggle Diagram
Data Transmission
Method Of Synchronization
ASYNCHRONOUS
Data is transmitted in an agreed bit pattern
Data bits are grouped together and sent with control bits, so the receiver knows when the data starts and ends - prevents data mix-up
SYNCHRONOUS
Continuous stream of data accompanied with timing signals generated by internal clock.
Timing must be accurate since no control bits are used
Faster method than asynchronous transmission.
Direction Of Data Transmission
HALF-DUPLEX
Both Directions, but not at the same time. For eg. Walkie Talkies
FULL DUPLEX
Both directions simultaneously. For eg. Broadband connection on phone line
SIMPLEX
One direction only. For eg. Data being sent from a computer to printer
Method Of Data Transmission
SERIAL
One bit at a time over a single wire or channel, in a single stream.
Preferable for long distances
Slower rate than parallel transmission
Since only one channel is used, data arrives destination in sync
Example: Sending data from computer to modem for transmission over telephone line
PARALLEL
Several bits of data are sent over several channels at the same time.
Preferable for short distance (bits will be out of sync in long distance)
Faster rate than serial transmission
Example:Sending data to printer from a computer using ribbon connector