Arp requests

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PCHF Member
PCHF Member
May 9, 2019
Hello, can anyone help me understand these arp requests please?
It is difficult for me as an inexperienced person to imagine what exactly is going on here...

0xb - (MAC address of device xyz) - ff-ff-ff-ff-ff-ff - request - (MAC address xyz) - ff-ff-ff-ff-ff-ff - - - in

I assume that here is device broadcasting his IP and MAC only to devices with ip ??

0xb - (MAC address of device 123) - ff-ff-ff-ff-ff-ff - request - (MAC of device 123) - 00-00-00-00-00-00 - - - in

I don't understand why there is 00-00-00-00-00-00 instead of ff-ff-ff-ff-ff-ff, but I understand that device 123 sends its IP and MAC address to all devices in the range -

Btw what means the "- in" at the end of requests?

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