CompTIA Network+ N10-009 Practice Question

The correct configuration to ensure a specific range of IP addresses is always distributed to a particular department's devices is to use reservations. DHCP reservations bind specific IP addresses to the MAC addresses of devices, guaranteeing that these devices receive the same IP addresses each time they connect to the network. In contrast, exclusions are used to prevent certain IP addresses from being assigned from a scope; scope defines the entire range of possible IP addresses that can be assigned to devices; and lease time determines how long a device holds an IP address before it must renew its DHCP configuration.