Network

Lookup MAC in ARP with Powershell with exact address - Get-NetNeighbor | ? { $_.LinkLayerAddress -eq "88-6F-D4-B8-1D-AD" } 

Lookup MAC in ARP with Powershell with partial address - Get-NetNeighbor | ? { $_.LinkLayerAddress -like "88-6F-D4*" }