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When I use a broadcast IP address, for example 198.255.255.255, what will happen when it gets passed down to the link-layer which will then look for the corresponding MAC address in your ARP table. Does your ARP table have an entry for 198.255.255.255;FF:FF:FF:FF:FF:FF, if not, how can the link-layer know it should use FF:FF:FF:FF:FF:FF as physical address to broadcast it into the subnet?

Thanks -Vexea

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Does your ARP table have an entry for 198.255.255.255;FF:FF:FF:FF:FF:FF?

Yes, it does if that is your network broadcast address. It will also have an entry for the Limited Broadcast address 255.255.255.255 relating to ff-ff-ff-ff-ff-ff.

You can see this if you show your ARP table (arp -a for Windows).

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  • when you look at my previous questions from months ago when I just started, you answered some of them, thank you for your help!
    – Vexea
    Mar 25, 2022 at 21:27

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