italk(IT)

DHCP server can distribute static IP address to client by using MAC address device but static IP should not duplicate with IP pool on DHCP server. This feature may help you for easy to manage IP address in your organization. Step as Video 

When client want bypass authentication for access to the internet but you cannot get MAC address of each client Another solution you can bypass by using client's IP address because you get client's IP address on DCHP server Step as Video

When you enable feature captive portal that force client must authenticate before access to the internet but you want to exempt some client such as VIP, Admin, Board, President. You can exempt captive portal for them by add MAC address device to captive portal configuration Step as Video

You can use DHCP server to distribute IP address to your client. When client plug-in network and not config static IP address a DHCP server will distribute IP address to client. If client have an IP address client will access to your network such as Internet, RDP, File sharing or etc. I have a video to show "How to enable DHCP server on pfsense"  Step as Video

If you need exempt distribute some IP in subnet or distribute many IP range. You should be use IP pool feature because you can created many IP range on one interface but IP range must is in subnet of network interface. Example LAN interface IP: 172.16.0.1/24 Available IP pool range: 172.16.0.2 - 172.16.0.254 Unavailable IP pool range: Exempt! 172.16.0.2 - 172.16.0.254 Amount IP pool: Many Step as Video