Dynamic Host Configuration Protocol (DHCP, Dynamic Host Configuration Protocol), this protocol is used to automatically manage the IP address, subnet mask, gateway address, DNS address and other parameters of hosts in the local area network, which can effectively improve the utilization of IP addresses and improve Configuration efficiency, and reduce management and maintenance costs.
Scope: A complete IP address segment. The DHCP protocol manages network distribution, assigns IP addresses and other configuration parameters according to the scope.
Super scope: used to manage multiple logical subnet segments in the same physical network. The super scope contains a list of scopes that can be managed uniformly.
Exclusion range: Exclude certain IP addresses in the scope to ensure that these IP addresses will not be assigned to DHCP clients.
Address pool: After the scope of DHCP is defined and the exclusion range is applied, the remaining IP address range used for dynamic allocation to DHCP clients.
Lease: The time during which the DHCP client can use the dynamically assigned IP address.
Reservation: Ensure that a specific device in the network always obtains the same IP address.
Architecture of the dhcpd service program configuration file
