-=PCTechTalk=- MAC Address

I thought each individual device on a network had only one
MAC address.  
 
Trend Micro monitors my wireless and it reported my
roommates laptop on the network using two different IP
addresses and 2 different MAC addresses
 
Also, neither MAC address matches the MAC address on the
laptop. 
 
Is it possible the network adapter in the laptop is a
different MAC than the one for the laptop as a whole?  
 
Or, could it be sensing the cable side of the adapter as one
MAC and the wireless side as another MAC?
 
Could it be incorrectly reporting the router and its IP as
the laptop at the same time it is reporting the laptop on a
different IP & MAC?
 
Why don't any of the MAC addresses match the MACs listed on
the devices?
 
My printer has a built in server and it is connected via
CAT5 to the router.  Should it have a MAC and IP address?  I
can't find a MAC anywhere on the printer.
Thanks,
 
Don
--
 
Titusville (FL) High School Class of '68  40th Reunion
Please join our Yahoo Group at:
http://groups.ya
hoo.com/group/ths68/
 
 
 

 

 
---------------------------------
 Get your own web address.
 Have a HUGE year through Yahoo! Small Business.

--
<Please delete this line and everything below.>

To unsub or change your email settings:
http://ww
w.freelists.org/webpage/pctechtalk

To access our Archives:
ht
tp://groups.yahoo.com/group/PCTechTalk/messages/
http://
www.freelists.org/archives/pctechtalk/

Ok... first of all, MAC addresses can be spoofed... though,
generally speaking, if its spoofed its done so intentionally
by another person.
Second... every networking device will contain its own MAC
address. So, an ethernet card will have one, a wireless card
will have one, a USB wireless card will have one, a router
will have one as well, a modem will have one, etc. You get
the point.


So, yes, a laptop can have 2 MACs. One for the wired network
card, and one for the wireless.
 
======================================
= SirTroth
= ICQ: 1717439
= AIM/AOL: SirTrothX
= YAHOO: SirTroth
= MSN: SirTrothhotmail.com (don't email me here)
= SKYPE: SirTroth
= XFIRE: SirTroth
======================================
 

On Sat, 17 Feb 2007 16:15:19 -0800 (PST), dswabc wrote:
> I thought each individual device on a network had only
one MAC
> address.
>
> Trend Micro monitors my wireless and it reported my
roommates
> laptop on the network using two different IP addresses
and 2
> different MAC addresses
>
> Also, neither MAC address matches the MAC address on
the laptop.
>
> Is it possible the network adapter in the laptop is a
different MAC
> than the one for the laptop as a whole?
>
> Or, could it be sensing the cable side of the adapter
as one MAC
> and the wireless side as another MAC?
>
> Could it be incorrectly reporting the router and its IP
as the
> laptop at the same time it is reporting the laptop on a
different
> IP & MAC?
>
> Why don't any of the MAC addresses match the MACs
listed on the
> devices?
>
> My printer has a built in server and it is connected
via CAT5 to
> the router.  Should it have a MAC and IP address?  I
can't find a
> MAC anywhere on the printer.
> Thanks,
>
> Don
> --
>
> Titusville (FL) High School Class of '68  40th Reunion
Please join
> our Yahoo Group at: http://groups.ya
hoo.com/group/ths68/
>
>
> ---------------------------------
> Get your own web address.
> Have a HUGE year through Yahoo! Small Business.
>
> --
>
>
> To unsub or change your email settings:
> http://ww
w.freelists.org/webpage/pctechtalk
>
> To access our Archives:
> ht
tp://groups.yahoo.com/group/PCTechTalk/messages/
> http://
www.freelists.org/archives/pctechtalk/


--
<Please delete this line and everything below.>

To unsub or change your email settings:
http://ww
w.freelists.org/webpage/pctechtalk

To access our Archives:
ht
tp://groups.yahoo.com/group/PCTechTalk/messages/
http://
www.freelists.org/archives/pctechtalk/