Quick question> Mac address

sniffy · 27 Apr 2007 at 18:18

If they were identical cards then I guess it makes sense they had a problem with production or something.

Dano · 27 Apr 2007 at 18:19

Aye, that is what we surmised, still haven't been as lucky on the lottery though

sniffy · 27 Apr 2007 at 18:22

Dano said:
still haven't been as lucky on the lottery though

Hehe

Una · 27 Apr 2007 at 18:35

Psyk said:
interclick = internet?

In fact I'm not even sure some types of internet connection even have the concept of a mac address, so it wouldn't be used at all outside of your own network.

With a cable modem I imagine the only device that has knowledge of your router's mac address is the cable modem itself.

Kinda, the Mac address in only used in the Physical Layer and Datalink layer.. Internetworking devices outside your own network are usually layer3+ so use ARP to convert layer 3 protocols to layer 2 mac addresses (I.e usually the endpoint devices).

Psyk · 27 Apr 2007 at 18:39

Una said:
Kinda, the Mac address in only used in the Physical Layer and Datalink layer.. Internetworking devices outside your own network are usually layer3+ so use ARP to convert layer 3 protocols to layer 2 mac addresses (I.e usually the endpoint devices).

Looks like someone is Cisco Certified

Una · 27 Apr 2007 at 18:42

No just a CS student

Though wouldn't mind doing a CCSP sometime if I get the chance.

WotDa · 27 Apr 2007 at 18:43

Psyk said:
Looks like someone is Cisco Certified

I was thinking of doing that myself, but after reading that and understanding non of it I think not.

Ice Rich · 27 Apr 2007 at 18:58

WotDa said:
I was thinking of doing that myself, but after reading that and understanding non of it I think not.

oddjob62 · 27 Apr 2007 at 19:24

Una said:
Internetworking devices outside your own network are usually layer3+ so use ARP to convert layer 3 protocols to layer 2 mac addresses (I.e usually the endpoint devices).

Well not really (although it may just be the way you've worded it. The other "internetworking" devices will still must use layer 1 and 2.

Una · 27 Apr 2007 at 19:36

oddjob62 said:
Well not really (although it may just be the way you've worded it. The other "internetworking" devices will still must use layer 1 and 2.

Thats what I meant although it was worded badly.

Basically if your router has at least one other router in between source and destination then they would not have your mac address in their arp tables. So its kinda impossible to get the mac address of your NIC after more than one hop.

Stolly · 27 Apr 2007 at 19:39

oddjob62 said:
Well not really (although it may just be the way you've worded it. The other "internetworking" devices will still must use layer 1 and 2.

Tis true, although some upstream device doen't need to know the physical layer information for my local network. I guess thats what he meant.