What is the difference between a Node Locked and a Floating license?

Node Locked licenses (Cert No. NX-?????????) are only available on one specific CAD workstation. The software is locked to this machine by the LAN-ID of the network card.

Floating licenses (Cert No. FC-??????????) are available on multiple CAD workstations via license server. BCT Software checks if there are free licenses available on the server. The software is locked to the server name and LAN-ID of the network card.