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dhcp-client
DHCP uses the clients MAC address to determine the IP address a client receives.
The port 67 and port 68 are used by DHCP and the DHCP clients.
Router is usually configured as a DHCP client for WAN (Internet) network and as a DHCP server for local network.
The Integrated Router is both a DHCP client and a server (p 186 BMF)
Leases are retained in the DHCP server database four hours after expiration. This grace period protects a client lease in case the client and server are in different time zones, the individual computer clocks are not synchronized, or the client computer is off the network when the lease expires. Expired leases are included in the list of active leases and are distinguished by a different icon.
A. The PTR resource record.
A DHCP server will privide a client with a valid IP address for the network for which the DHCP server is providing a service.Where there is no DHCP server the IP address for a client must be set manually. When doing this care must be taken to ensure that two IP addresses are not set the same on the network.
Below are the steps how DHCP Client/Server relationship works.IN the network the clicent device requests a packets to DHCP server to login to the network. This Packet known as DHCPDiscover.The DHCP Server receives that packet and in responce it sends a packet to the client, this is called as DHCPOffer. This DHCPOffer packet contains unleased or unused list of IP(Internet Protocol) addresses over the LAN.The DHCP Client receives the DHCPOffer from DHCP Server and responds. This is called DHCPRequest, and this request contains the accepted IP address in the DHCPOffer it received from DHCP Server.Now the DHCP Server receives the DHCPRequest and sends back the DHCPPackets and lets clients to access network.
integrated services router
DHCP lease
The client