getting quick arp request

[Ben Sizer]

seb wrote:
> I need to write a scanner that test all the IP adresses that repond on
> a given port.
...
> I am using winXP pro on a 2GHZ P4 and 512 Mo.

If you have XP Service Pack 2, it cripples port-scanning as part of a
'security' fix. Broadly speaking, it limits the rate at which you can
make connections at the OS level; this will show up as event 4226 in
the Event Viewer if it affects you.

-- 
Ben Sizer