Re: Setting and Routing on the TOS Source (SRC) and Destination (DST) Bits

["Sascha Reissner" <sascha.reissner@toxicnet.de>]

From: "Antony Stone" <Antony@Soft-Solutions.co.uk>

> On Sunday 22 September 2002 2:35 pm, Jim Fleming wrote:
>
> > Have you ever calculated how much bandwidth is wasted each year
> > with 4 of the 160 bits in every packet as useless ?
>
> Actually, it's 4 of every 160 bits in the *header* - there's up to another
> 1500 *bytes* (on ethernet) of body in the packet as well, so the wasted
> bandwidth varies from 4/160 = 2.5% for empty packets, to 4/12160 = 0.03%
for
> full ones.
>
> Most people are going to have full packets in one direction (the direction
> that's got saturated bandwidth), and empty ACK packets in the other
direction
> (which has oodles of bandwidth to spare because all the packets are
empty).
>
> Therefore I think 0.03% wasted bandwidth on a full link, and 2.5% wasted
on a
> virtually idle link are very acceptable.
>
> Antony.


i guess 1 more offtopic mails like this compensates all "useless header
overhead" per user for a year.