What Rogers call 'service' [was: Micro Routers (Was: : Raspberry PI (as router))]

James Knott james.knott-bJEeYj9oJeDQT0dZR+AlfA at public.gmane.org
Wed Jun 13 12:22:33 UTC 2012


Bob Jonkman wrote:
> accounting for start bits, stop bits, and other bits
????

Start & stop bits went out with dial up modems.  Ethernet uses 
synchronous communications, not async.  With async, each character was 
sent independently from the rest and contained it's own start and stop 
bits, so you'd have 1 start bit, 8 data bits and one stop bit (assuming 
ASCII at greater than 110 b/s).  With Ethernet, you have frames 
containing address info, data, check data and more, sent as one large 
block.  With Ethernet, the data portion is limited to 1500 bytes, but IP 
supports up to 65K bytes, IIRC.
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