disable autologin by modify the file /etc/inittab

[tux_italian]

A)
i have successfully disabled autologin,i have edit the file /etc/inittab
the original /etc/inittab:

::sysinit:/etc/rc.d/rc.sysinit
tty1::respawn:/sbin/getty -n -l /bin/autologinroot 38400 tty1
tty2::respawn:/sbin/getty 38400 tty2
::ctrlaltdel:/sbin/reboot

my current /etc/inittab:

::sysinit:/etc/rc.d/rc.sysinit
tty1::respawn:/sbin/getty 38400 tty1
tty2::respawn:/sbin/getty 38400 tty2
::ctrlaltdel:/sbin/reboot

i have deleted the "-n -l /bin/autologinroot"
what's the "-n -l" ???
is important for system security?
this method is created by me!!! i'm not sure if this is correctly,hovewer the pc work correctly.