What is the benefit of using FortiGate NAC LAN Segments?

What is the benefit of using FortiGate NAC LAN Segments?

A. It provides support for multiple DHCP servers within the same VLAN B. It provides physical isolation without changing the IP address of hosts C. It provides support for IGMP snooping between hosts within the same VLAN D. It allows for assignment of dynamic address objects matching NAC policy