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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