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A network administrator reserves a range of IP addresses for DHCP, and each DHCP client on the LAN is configured to request an IP address from the DHCP server during network initialization. The request-and-grant process uses a lease concept with a controllable time period, allowing the DHCP server to reclaim and then reallocate IP addresses ...
The Dynamic Host Configuration Protocol version 6 (DHCPv6) is a network protocol for configuring Internet Protocol version 6 (IPv6) hosts with IP addresses, IP prefixes, default route, local segment MTU, and other configuration data required to operate in an IPv6 network.
Some DHCP servers also provide the legacy BOOTP functionality. When a network-connected computer boots up, its IP stack broadcasts BOOTP network messages requesting an IP address assignment. A BOOTP configuration server replies to the request by assigning an IP address from a pool of addresses, which is preconfigured by an administrator.
Server BOOTP DHCP DHCPv6 Other Load balancing Failover dhcpy6d No No Yes PXE, Dynamic DNS: Yes Yes dnsmasq Yes Yes Yes PXE, TFTP: No No ISC DHCP Yes Yes Yes Dynamic DNS [10] [11] ...
If a DHCP client outside the DHCP server's subnet broadcasts an address request, it is the helper that forwards the message to the DHCP server. The server then chooses an address and sends the client a unicast message, using the helper to send the message back to the client's subnet.
Clients may solicit an IP address from a DHCP server when they need one. The DHCP server then offers the "lease" of an IP address to the client, which the client is free to request or ignore. If the client requests it and the server acknowledges it, then the client is permitted to use that IP address for the "lease time" specified by the server.
The host broadcasts a request containing the node's IP address, and the node with that IP address replies with its MAC address. ARP has been implemented with many combinations of network and data link layer technologies, such as IPv4 , Chaosnet , DECnet and Xerox PARC Universal Packet (PUP) using IEEE 802 standards, FDDI , X.25 , Frame Relay ...
In practice, in protocols like PPPoE which is commonly used in home broadband connections, the latter method (request suggestion, nak with suggestion, request suggested address) is used to set the IP address of the ISP's client endpoint (i.e. the customer-premises equipment), while the former method (request address) is used to inform the ...