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Cheers, I am trying to learn more about DHCP, and when studying about the session that DHCP goes through every one mentions that it broadcasts a discover message at IP: (255.255.255.255) (as seen here for example), but I can't find more info about how this IP is picked or what it signals. From my professor, I know that the last IP of a subset is the broadcast IP (e.g. 192.168.1.255, for a subset with mask 255.255.255.0), so I would suppose that's what should be used, but apparently I am thinking about something incorrectly. Can anyone provide me with some more info on the subject? Thanks a lot.

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255.255.255.255 is the broadcast address for all subnets.

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  • Better: "for any subnet".
    – Zac67 ♦
    Commented May 14, 2022 at 13:39

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