+.br
+.B Examples :
+.br
+.I " iwconfig eth0 frag 512"
+.br
+.I " iwconfig eth0 frag off"
+.TP
+.BR key / enc [ryption]
+Used to manipulate encryption or scrambling keys and encryption mode.
+.br
+To set the current encryption key, just enter the key in hex digits as
+.IR XXXX-XXXX-XXXX-XXXX " or " XXXXXXXX .
+To set a key other than the current key, append
+.I [index]
+to the key itself. You can also enter the key as an ASCII string by
+using the
+.I s:
+prefix.
+.br
+To change which key is the current active key, just enter
+.I [index]
+(without entering any key value).
+.br
+.IR off " and " on
+disable and reenable encryption,
+.I open
+set the system in open mode (accept non-encrypted packets) and
+.I restricted
+discard non-encrypted packets.
+.br
+.B Examples :
+.br
+.I " iwconfig eth0 key 0123-4567-89"
+.br
+.I " iwconfig eth0 key s:password [2]"
+.br
+.I " iwconfig eth0 key [2] open"
+.br
+.I " iwconfig eth0 key off"
+.TP
+.BR power
+Used to manipulate power management scheme parameters and mode.
+.br
+To set the period between wake up, enter
+.IR "period `value'" .
+To set the timeout before going back to sleep, enter
+.IR "timeout `value'" .
+By defaults, those values are in seconds, append the suffix m or u to
+specify values un milliseconds or microseconds.
+.br
+.IR off " and " on
+disable and reenable power management. Finally, you may set the power
+management mode to
+.I all
+(receive all packets),
+.I unicast
+(receive unicast packets only, discard multicast and broadcast) and
+.I multicast
+(receive multicast and broadcast only, discard unicast packets).
+.br
+.B Examples :
+.br
+.I " iwconfig eth0 power period 2"
+.br
+.I " iwconfig eth0 power 500m unicast"
+.br
+.I " iwconfig eth0 power timeout 300u all"
+.br
+.I " iwconfig eth0 power off"