IP Networking

I posted this thread under BSD but realized that it actually belongs here instead.... makes more sense to put it under IP. So without further delay on to my problem ...
I havent been using UNIX for that long, so this question might sound quite stupid to most of you. I want to know how to mask my MAC address
I found a command on how to do it but I dont think it works:
"ifconfig <interface> link <address>"
Unfortunately being the n00b I am, I dont really even know how to view my MAC address. So i dont really how to mask it, or even if this command worked or not. If anyone could please tell me how to check my MAC address and if there is a way to change it.
Thanks

the way i check my MAC address on network card by command

$llistat;

thanks , never noticed the MAC was under ether in my "ifconfig" in wireless, got it to change. All I need to know now is if my computer will broadcast a changed MAC after I have already connected to the network using the original MAC, i.e. will it ask for a new IP as that previous IP is assigned to the original MAC on the network, or will I just get dissconected

PS:
command to change ur MAC in FreeBSD is
'ifconfig <interface> link <address>'
Make sure the address u specify follows the standard format for MAC addresses, i.e. xx:yy:zz:aa:bb:cc, .... (took me 2 hrs to figure that out .... damn it)...oh and I dont know if u should really change the first 4 parameters of the MAC, because they might be assigned to the company that ur computer belongs to...still not sure... will try and tell you guys later;

Peace