Parallel vs Serial

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Parallel vs Serial

Postby Vic the Trader » Sun Jan 25, 2009 4:46 pm

In every day life, how often are parallel connections used when compared to serial connections?

Is the advantage of parallel connections simply a quicker transfer of data?
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Postby Karlsweldt » Mon Jan 26, 2009 4:32 pm

Parallel connections were the fastest "hard wire" paths, with up to 2.5 Mb/s speed or better, depending on run length and cable type plus format. The serial port can max out to only 128 Kb/s. USB 2.0 is the fastest "simple" connection, with up to 480 Mb/s or 60 MB/s speed. LAN connections are still faster, with the three range models that will work at 1000 MB/s, 100 MB/s or default at 10 MB/s.
Serial ports use only a two-lead data path, unless the 'true' RS-232 type. They can communicate in one direction at one time only, where parallel cables can 'talk' both ways simultaneously.

Edit:
I made a typo.. concerning the speed of LAN! Was shown as 1 MB/s, should have been 1000 MB/s!! Corrected! :oops:
Last edited by Karlsweldt on Tue Jan 27, 2009 2:21 pm, edited 1 time in total.
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Re: Parallel vs Serial

Postby evasive » Mon Jan 26, 2009 10:03 pm

Vic the Trader wrote:In every day life, how often are parallel connections used when compared to serial connections?

Is the advantage of parallel connections simply a quicker transfer of data?


telephone: serial
cable: serial
adsl: serial
wired network: serial

there used to be some parallel stuff inside you computer, the data cable to your harddisk, cdrom and floppy, the printer port
the harddisk and cdrom/dvd are now connected to sata, which is a serial connection. the printer and floppy (if any) are USB which is also serial.

can you see the way things are going?
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Postby Karlsweldt » Tue Jan 27, 2009 2:23 pm

Don't forget the SCSI storage system.. Small Computer Serial Interface. Still "king" of data handling.
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Postby evasive » Wed Jan 28, 2009 1:47 am

yep but now even that is more serialized as it is going to SAS, Serial Attached SCSI...
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