Hi!
X.25 is a set of CCITT recomendations for transmitting dato over PDNs
protocol suit, including OSI Layers: Physical, Datalink & Network.
The speed is on Physical Layer. At the physical layer, the X.25 standard
assumes an X.21 interface, but can also support V.35 and the EIA RS232-D
interfaces.
X.21 bis is up to 19,2 Kbps, V.35 is up to 2Mbps, and RS232 is up about
115,200 or something like this.
> I have a question about x.25 transmit rate as following:
> What is the maximum transmission rate for X.25?
>
> A. 56 Kbps
> B. 64 Kbps
> C. 128 Kbps
> D. 1.544 Mbps
>
> Thanks
>
> dean
>
>
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