which protocol use dbi=?iso-8859-1?Q?=3F?=

[Nicolas MENANT]

I'm wondering which protocol is use by dbi/dbd-Oracle
when i do :

$dbh = DBI->connect('dbi:Oracle:host=xxx.XXX.XXX.XXX;sid=ORACL;port=126', 'xxxxx', 
'xxxxl');

i think it's tcp but i'm not sure ...

Thanks

Nico