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Addressing a host directly using MAC during BOOTP startup

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From: Jesse C.
Date: Mon 22nd Jun, 2:28pm
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Hi Chris, hope you've been well,

I'm confused about how you can respond to a host directly RE: BOOTP startup in the screenshot below.

https://gyazo.com/f44f0becb36d08b64c5242a348fe3219

If the server has not assigned an IP to this host yet, how is it possible to address this computer directly? Will intermediate hosts read the physical address included in the original broadcast and store routing information according to some kind of routing scheme, allowing the server to route frames back to the host?

Thanks,
Jesse

Addressing a host directly using MAC during BOOTP startup

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From: Edward A.
Date: Wed 24th Jun, 7:04pm
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"Jesse Carter" <22*7*0*[email protected]*u*e*t*u*a*e*u*a*> wrote:

> Hi Chris, hope you've been well,
> 
> I'm confused about how you can respond to a host directly RE: BOOTP startup in the screenshot below.
> 
> https://gyazo.com/f44f0becb36d08b64c5242a348fe3219
> 
> If the server has not assigned an IP to this host yet, how is it possible to address this computer directly? Will intermediate hosts read the physical address included in the original broadcast and store routing information according to some kind of routing scheme, allowing the server to route frames back to the host?
> 
> Thanks,
> Jesse

My understanding is that during the BOOTP IP assignment process the BOOTP server would provide IP information to the host via broadcast, except in cases where the host has a direct link to the host (i.e. they are on the same stretch of ethernet).

In those cases it simply sends the message down the same link it arrived on, addressed to the MAC address it was provided in the initial BOOTP request. 
 
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