Dhcp

shedoshedo Posts: 7Registered Users ■□□□□□□□□□
hello
so i was reading about situations dictate when packet is denied : ( from Secure.642-637.Official.Cert.Guide )
one situation is
* A packet is recived from a DHCP relay-agen that does not match 0.0.0.0, or the DHCP relay agent forwards a packet
than inculdes option-82 information on an untrusted switchport or interface.

i dont really understand what does it mean i know what relay-agent is but what is the 0.0.0.0 ? and option-82?

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