Andy Furniss wrote:
Tobias Diedrich wrote:
Hi,
I've written a small javascript ADSL throughput calculator:
http://nukunuku.yamamaya.is-a-geek.org/~ranma/adsl.html
Feel free to submit alternative presets (I currently have presets
for three german telecom speed variants: T-DSL (1000|2000|3000),
derived from
http://www2.lancom.de/kb.nsf/5d445c701b3ff52dc1256e7700297e5c/27c6ee1c3e3f74b0c1256e94004a433e?OpenDocument).
Comments, suggestions, spelling nitpicks?
Looks good - one picky point - if your overhead means only 4 bytes
padding at default mtu are needed, then reducing mtu to be "optimal" for
IP and above levels may be less efficient from the point of view of the
tcp data because of the reduced payload vs fixed overheads.
I haven't done the maths on that :-)
Which I should have done first :-)
If timestamps are off it's still about 1 1/3 bytes per frame more
efficient. If they are on (default on linux costing 12 bytes) the
smaller mtu is about 1 byte per frame less efficient.
Andy.
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