What layer of the TCP/IP network does ARP belong to? [closed]
They are both correct depending on which model you are using. The Internet Layer in the TCP/IP model translates to the same thing as the Network Layer in the OSI model.
ARP is used to resolve the MAC addresses, and work on Layer 2 of the OSI model.
It may belong in layer 3, as is widely documented.
But it really does its work in layer 2, as is also widely documented.