Each client maintains an ARP (Address Resolution Protocol) table which associates the IP address to it's corresponding MAC address
Layer 1
Layer 2
Layer 3
Layer 4
Layer 5
Layer 6
Layer 7
Computers can see all 7 layers of the OSI model so seeing layer 2 and 3 as in this case is normal
The ARP function here is sort of redundant since there is only 1 connection
Computer To Computer