Standards/Ethernet/Ethertype
From UIT
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The Ethertype indicates which protocol is encapsulated in the payoad of the Ethernet frame.
IP
The most known Ethertype is 0800 for Internet Protocol version 4 (IPv4).
In turn, Ethernet encapsulates transport layer protocols such as
TCP and UDP share a number of ports.
ARP
Address Resolution Protocol allows to find the MAC address associated to a given IP address.
It has Ethertype 0806.
