Tutorial on What DHCP is and how to Install and Configure it.

Extra's in this tutorial:

Explanation of what a DHCP Server is
Explanation of what a Scope is and how to make one on DHCP
Explanation of what a Exclusion is and how to do one on DHCP
Explanation of what a Reservation is and how to do one on DHCP
Explanation of what a Lease is and how to configure it on DHCP.

Some of the tools I mentioned in this video which are very useful Technician tools to use to scan a network to fine a MAC address:

Advanced IP Scanner:
https://www.advanced-ip-scanner.com/

NetScan:
https://net-scan.en.lo4d.com/windows