DHCP (Dynamic Host Configuration Protocol) allows you to automate the configuration of the network client addresses; IP Management simplifies the configuration of the address. On all participating computers, TCP / IP network or the Internet and other IP addresses that are assigned IP information must be set. The host computer or other IP network can communicate with other computers on the network or host address.

A network client with some additional information, subnet mask, default gateway and DNS information are necessary for the server. Instead of manually entering this information on each client, DHCP if you can do this automatically. For, DHCP, the device, DCHP to work you need to work as a server. This device, the computer can be the type of routers and other network devices. DHCP server IP range or ranges of addresses, the request is set to be used to give to a client. Also, you can set the parameters in the above network.

For the client, DHCP have to now be able to get information from the server. When you start the DHCP in this way when you are expecting a set of servers. The DHCP process is used depends on the implementation. Implementation of DHCP, it works, for example: Microsoft: Client sends a DHCPDISCOVER packet, and you try to log on to the network client, the first time. Then, DHCP server, DHCPDISCOVER packet to receive a non-IP address and other TCP / IP configuration information including the lease of the DHCPOFFER response packet.

If you are, DHCP client receives a DHCPOFFER packet and, then, DHCPREQUEST broadcast to provide the IP packet that contains the address, in response, and provide the IP address of the acceptance. Has been selected click the DHCP server IP address, the client can access the network by sending a packet DHCPAck, clients have recognized the DHCPREQUEST. DHCP client, 50% of lease time, DHCP DHCPREQUEST to the server please refresh its lease has expired by sending a message. Also, reboot again and try to send a message when the IP settings for this acquisition.

Client IP depends on how you set the amount of time to lease an address. Microsoft, the default period is eight days. If the client IP address, DHCP to use the, DHCP server and can not find, APIPA (Automatic Private IP addresses used are the most likely set) instead of enter the address. The use APIPA, DHCP to automatically configure itself to the client's IP address and subnet mask is not in the, DHCP server is available. Is, IP address used in the APIPA range from 255.255.0.0 to 169.254.0.1 169.254.255.254 is a class B subnet mask. DHCP server to the client, this self-set becomes available IP address is used. So, your new DSL is at home trying to configure the router to notify the IP address of 169.254.xx, so most of it from the router to obtain IP addresses can not, ipconfig command running.