On Jun 28, 2006, at 7:25 AM, Martin Klingensmith wrote:

> Nate Duehr wrote:
>
>> On Jun 28, 2006, at 1:23 AM, Philip Pemberton wrote:
>>
>>
>>
>>> Nate Duehr wrote:
>>>
>>>
>>>> Probably "mommy" just sends out a broadcast packet that all
>>>> "children" know to respond to in a certain way.  If your LAN were a
>>>> class A (e.g. 10.0.0.0/8) it'd take "mommy" a very long time to  
>>>> find
>>>> her "children".  :-)
>>>>
>>>>
>>> Nah, probably a broadcast ping or packet. For 10.0.0.0/8, your
>>> bcast address
>>> would be 10.255.255.255, so send a packet there and every device on
>>> that
>>> subnet should pick it up. Check the packet over, see if it's valid,
>>> and
>>> respond to the sender if it is.
>>>
>>>
>>
>> Isn't that what I just said?  " 'mommy' just sends out a broadcast
>> packet"...
>>
>> Hello Phil??  More coffee man!
>>
>> :-)
>>
>> Nate
>>
>>
> You said send out to all 10.0.0.0/8 which is about 16,581,375 IP
> addresses (a few more/less perhaps)
> A broadcast ping is physically addressed to the single IP address
> 10.255.255.255. Anyone on 10/8 should receive it.
>

Sigh, read it again.

Dave said he thought the PC was "finding" the printer, and he guessed  
it was via some sort of scanning mechanism.

I replied by saying that no, it's probably using a broadcast and *IF*  
the PC was scanning the whole range it would take too long.

Now two people are saying, "No it's using a broadcast."

Someone's not reading here... or you're replying to the wrong person.

Nate 
-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist