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Linux+ Ch12 DHCP
DHCP components and configuration
Question | Answer |
---|---|
Bootstrap Protocol(BOOTP) | network protocol that passes requests send from a disk-less workstation to a server node |
Dynamic Host Configuration Protocol (DHCP) | Service that allocates IP addresses on an as needed bases. |
DHCP Options | items in addition to IP and subnet that can be added to client systems like default gateways and DNS addresses |
DHCP Scope | a range of IP addresses for a subnet |
DHCP Reservation | an IP address that is assigned by DHCP but stays the same, permanently or until changed by an administrative task |
DHCP Lease | length of time a host uses an IP address |
dhcpd.conf | file located in /etc that contains DHCP configuration option changes made here will not take effect until the DAEMON is restarted |
dhcpd.conf Paramaters | commands that state how to perform a task enclosed in {} AKA options |
dhcpd.conf "shared-network" | declaration used on network containing multiple subnets 'shared-network shared (networkname) {[parameter] [declaration]} |
dhcpd.conf "subnet" | used to define subnet on a network |
dhcpd.conf "range" | specifies the range of IP addresses in a subnet |
dhcpd.conf "fixed-address" | Specifies static IP assigned by DHCP |
dhcpd | daemon that controls the DHCP functions |
dhcpd -p (port) | allows DHCP to listen on another port than 67 |
dhcpd -f | run dhcpd as a foreground process (background by default) |
dhcpd -d | allows dhcpd to log activities |
dhcpd -t | -T | tests dhcpd.conf for proper syntax without applying changes |
dhcpd -cf (config file) | allows use of alternate config file to dhcpd.conf |
dhcpd -lf (lease-file) | allows for use of alternate lease config file |
dhcpd.leases | leae database file |