IP addresses help us to reach/find networks
To deliver actual frames on a local network, we need the MAC-addresses.
To deliver actual frames on a local network, we need the MAC-addresses.
To solve this problem we have the ARP because it gets the MAC-address from the IP-address where we delivered it.
arp -?:

arp -a:
then we used the programm "Wireshark"..
it shows us the different Protocols and other things that happen in a network.
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