|
S.No
|
Serial Communication
|
Parallel Communication
|
|
1
|
Data
is transmitted bit after the bit in a single line
|
Data
is transmitted simultaneously through group of lines(Bus)
|
|
2
|
Data
congestion takes place
|
No,
Data congestion
|
|
3
|
Low
speed transmission
|
High
speed transmission
|
|
4
|
Implementation
of serial links is not an easy task.
|
Parallel
data links are easily implemented in hardware
|
|
5.
|
In
terms of transmission channel costs such as data bus cable length, data bus
buffers, interface connectors, it is less expensive
|
It
is more expensive
|
|
6
|
No
, crosstalk problem
|
Crosstalk
creates interference between the parallel lines.
|
|
7
|
No
effect of inter symbol interference and noise
|
Parallel
ports suffer extremely from inter-symbol interference (ISI) and noise, and
therefore the data can be corrupted over long distances.
|
|
8
|
The
bandwidth of serial wires is much higher.
|
The
bandwidth of parallel wires is much lower.
|
|
9
|
Serial
interface is more flexible to upgrade , without changing the
hardware
|
Parallel
data transfer mechanism rely on
hardware resources and hence not flexible
to upgrade.
|
|
10
|
Serial communication work effectively even at high frequencies.
|
Parallel
buses are hard to run at high frequencies.
|
