I'm sure deep down inside you know what you're talking about, I just wanted to make sure that those who don't know weren't picking up false information ;-)
Le 3 Janvier 2003 15:42, vous avez �crit : > Sorry. > > You're right. Subnet definitely is the wrong term. I should be saying LAN > or local network, or something like that. That becomes obvious if we talk > about a network that isn't running IP, (IPX, for example), and therefore > has no subnet at all. > > I know that you're right, and I know that I'm saying it incorrectly. But > what I'm thinking is correct. I'm just not articulating it correctly. If > that makes sense. > > :) > > Kev. > > > ----- Original Message ----- > From: "S�bastien Taylor" <[EMAIL PROTECTED]> > To: <[EMAIL PROTECTED]> > Sent: Friday, January 03, 2003 3:31 PM > Subject: Re: (clug-talk) MAC s > > > Again, you're mixing things here. A subnet is a way of organizing IP > addresses, which has nothing todo with ethernet and MAC addresses except > for the fact that you can do IP over Ethernet...much like you can do IP > over carrier pigeons ;-) > > Le 3 Janvier 2003 14:56, vous avez �crit : > > His question seemed to be looking for an overview rather than meat and > > potatoes. > > > > Others answered in a similar (though less long-winded way). My PC's Mac > > doesn't matter except in my own subnet. Changing the MAC won't matter > > unless it's a duplicate on your own subnet. > > > > Kev. > > > > > > ----- Original Message ----- > > From: "S�bastien Taylor" <[EMAIL PROTECTED]> > > To: <[EMAIL PROTECTED]> > > Sent: Friday, January 03, 2003 2:37 PM > > Subject: Re: (clug-talk) MAC s > > > > > > Actually no, that's not how it works. When sending ethernet data you use > > MAC > > to address devices, when sending TCP/IP data you use IP addresses. Since > > on an ethernet network TCP/IP is sent over ethernet, TCP/IP packets are > > encapsulated in ethernet frames. You can have different physical network > > types on the same TCP/IP subnet which can talk to each other using IP > > addresses...obviously the same cannot be said about MAC addresses, since > > the next network might not be ethernet based. I would recommend reading > > up > > > on the ISO/OSI Network Model. > > > > Here's some hits... > > http://www.google.ca/search?hl=fr&ie=UTF-8&oe=UTF-8&q=OSI+Network+Model&met > > >a = > > > > Le 3 Janvier 2003 13:45, vous avez �crit : > > > An IP address is used to uniquely locate a NIC on a different subnet. > > > A MAC is used to uniquely locate a NIC on the same Subnet. > > > > > > So the IP address is used to hop across routers until it reaches the > > > network the destination is a member of (192.168.0.0/24 for example). > > The > > > > router will then pass the packet to the MAC (NOT THE IP) address of the > > > recipient. > > > > > > MACs are therefore necessary to allow communication on a network. I > > > can't think of a disadvantage. Potentially it could have some privacy > > > implications, because they obviously uniquely identify a PC, but this > > > > isn't > > > > > really much of a concern, MACs aren't passed across routers. Once a > > > > packet > > > > > leaves a given network, it uses an IP address until it reaches it's > > > destination. > > > > > > Being able to change your MAC address is a mixed blessing. If you > > change > > > > your MAC to be the same as someone else's on your subnet, that can be > > > really fun. Particularly if the troubleshooter isn't experienced. Old > > > Card (Especially ARCnet (in my experience)) sometimes had duplicate > > MACs. > > > > Being able to change you MAC is part of the TCP/IP spec. > > > > > > Kev. > > > > > > > > > > > > > > > ----- Original Message ----- > > > From: "BentWig Nut" <[EMAIL PROTECTED]> > > > To: <[EMAIL PROTECTED]> > > > Sent: Wednesday, January 01, 2003 3:58 PM > > > Subject: (clug-talk) MAC s > > > > > > > Hello all. > > > > > > > > Q1: What are the pros and cons of a M.A.C. address? > > > > > > > > Q2: What are the advantages and disadvantages of being able to > > > > > > > > change the MAC ? > > > > > > > > Waiting for the roof to fall in... > > > > > > > > > > > > > > > > > > > > > > > > _________________________________________________________________ > > > > MSN 8: advanced junk mail protection and 2 months FREE*. > > > > http://join.msn.com/?page=features/junkmail
